Malicious PDF — malware analysis report

Static analysis result for SHA-256 74edb86294237fbc…

MALICIOUS

PDF

86.7 KB Created: 2021-07-28 00:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d6b7b6f23eebd289597e52f632313856 SHA-1: ff35b9b5d402eb0b6877bcfff53c4c8f5f15fc05 SHA-256: 74edb86294237fbc17820c8ae8547cb26744e7141aaaccd892501400e79dccee
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple heuristics indicating malicious intent, including a high-confidence ML classification and ClamAV detection as a phishing trojan. The presence of a 'download button' lure and instructions for a password-protected archive strongly suggest a social engineering attack aimed at tricking the user into downloading a malicious payload. The numerous embedded URLs hosted on compromised or disposable domains further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://amirafouad.com/uploaded_files/file/fumiw.pdf In PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/54387536535.pdfIn PDF document text
    • http://17njl.com/userfiles/files/fuzovagosigibukuju.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/3hsui3vu2kbi2de6o6v3gbjgs6/71374829510.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/1042065575.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbef5e003---nigajosalujewaworu.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608395675a0c8---95317874097.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ed30875e6---76609177589.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/zisaxagobosanowe.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/24735222599.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b46708e3bc---vilopunawigori.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/538483d3753fab06d37832b5cfa5a14c/kagatok.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/kulararimutegexotupovi.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e21493e87---dugazejuj.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca3901ae84---27784445591.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609834e913ead---3503929687.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/ladidu.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e641da1ef71---zogolel.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ab046f0f328013febcc00492262ce660/56674712583.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac81cd41cd---dupemawotabamesafamunituf.pdfIn PDF document text
    • http://whitepurdeespires.com/clients/b/ba/ba703c466af5784ee38134b9d09df413/File/xanakomumedakasax.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3e7a95daa7b4a279a3b2bd33c4ebd7cd/mavetuboberekuruxasuwipes.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5995b8e77c---37433705368.pdfIn PDF document text
    • http://qachs88.com/clients/58271/File/40464246251.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/10547231503.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/30639f043fdd3394e43dc5c70f6c18d5/vikuramiponevusukugin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=gta+san+andreas+psp+rar+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 17068 bytes
SHA-256: 29cfadf44978761c46758e4461220ef78e671875368c6860dd86b7a622a61fb7
font_01_sfnt_off00011d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001354f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1354F 10420 bytes
SHA-256: 1cd0182c50f00b118b4f36eebccc0cb9b57138b232f7f321b1509bd363ab3ef9

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