Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafbde137fe1e6e1…

MALICIOUS

PDF

85.9 KB Created: 2021-07-27 07:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1347d455e42c95d8ee8840dc471feaa0 SHA-1: 27dc1fe0702252c3279de2b6d1e44a170d952b9b SHA-256: aafbde137fe1e6e1de0b6fdd4de0d59b8356ddb9a7c7584e1de208e2950254b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of embedded URLs and the nature of the heuristics suggest this document is intended to lure users to external sites, potentially for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c16744a70d.pdf In PDF document text
    • http://sme1970reunion.com/clients/7/78/786f1e38e9ed540b4a7d4f5dbcc09398/File/38967986392.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/5050222c24fdc7063906403534732400/xitemobalekala.pdfIn PDF document text
    • http://mhs69indians.com/clients/864804/File/28740918542.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/3661c39f21793db4972e282fc8ca2156/68359520516.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/dobogagimosugelede.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/87865869369.pdfIn PDF document text
    • http://furmanreunion2021.com/clients/3/37/3732e4fa3878e851f9d164dff32a9cbb/File/48183316312.pdfIn PDF document text
    • https://windsbs.biz/files/file/46743598494.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/jedaxonipaduvogi.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/logenusakotax.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/sasajapidavip.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/9af3bb7e5b197c118453741918a62f33/togidewenipuvenowozej.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/wuvevotebivagaga.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f42ff166d1e---68643576241.pdfIn PDF document text
    • http://vodnik48.ru/content/file/xabiwugabidexogutelukipo.pdfIn PDF document text
    • http://edgecs.net/documents/genokugimadotitefe.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/015c66fee872754b807c21605b7df6b1/38207008941.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/fulivubo.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/98b6136311a1a1f2cb63ca54224ef330/wukipixapexeti.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f585449b8b---mikadazopalegolu.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/37899346006.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/2d510792b5fb670e34dc5ca0a19c6545/74838900999.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/tudopi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=asphalt+8+hack+online+generator+androidPDF 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_off0000ea21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA21 11072 bytes
SHA-256: a6a3547e833104fb854344bdc2c25ef16e47054c4b0628d73970f50478c3674d
font_01_sfnt_off000103c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C2 16928 bytes
SHA-256: 283b24b63fcc2f17761d139483fffc0251dfb285d9cbe08a06cff3c23e676ee8
font_02_sfnt_off00013034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13034 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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