Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02aa006bdf7b0f4…

MALICIOUS

PDF

82.0 KB Created: 2021-09-19 01:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1ecabb2ed53e6773571fa9e454193de7 SHA-1: cdd65be9837acadd6834dddbdf3b64af7331d1ba SHA-256: b02aa006bdf7b0f45bd2ccce9d3466b038b8f6645455ab33b5d1f34acf00011b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • 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 https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c71f1c052---jepolelokurada.pdf In PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/kgifkr95reo4fjtu00jbh6id8p/95016933607.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/dozuwirabopuwumopunov.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/lekukesem.pdfIn PDF document text
    • https://wspaperbag.com/userfiles/file/13751862338.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109171424513131.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/61402217225.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/60061322095.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/94277837853.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/karonegajanilapuve.pdfIn PDF document text
    • http://phucuongplus.com/upload/files/53567521938.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/9ora9gmc2njkdui52kok3jmkkt/ganasawikafifizafujijazu.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/97408350077.pdfIn PDF document text
    • https://limadelimon.com/images/file/17878453428.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/pubewotugu.pdfIn PDF document text
    • https://tekartltd.com/upload/files/sivopiwubimojakegadisikaz.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/xikiwaxubevo.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/dagobosagaxaxogovuremujow.pdfIn PDF document text
    • http://salt17.com/userfiles/files/8799333077.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/99973612915.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/sopozufigesuwoxubabeb.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/toxolexurixuwo.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/87767829885.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614063328096e---jeguwagesunorisagozotimaj.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/35645597259.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/94045024618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=adult+mod+apkPDF 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_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 10132 bytes
SHA-256: 7830a53a5b9f0d9d38f0dd79989ef58ee9cd6d451b314baaa75645e4b9757c87
font_01_sfnt_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D4 19384 bytes
SHA-256: dcba7441a7943e1ba04fc143fa4cc135198f85540d65668fbf26d3f1e1d948dd

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