Malicious PDF — malware analysis report

Static analysis result for SHA-256 332ac95dc69c158b…

MALICIOUS

PDF

86.7 KB Created: 2021-08-03 00:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 36647a0413a933a0ae0695c650ebfa86 SHA-1: 25b72ddfbc3cb9748f163409b8620973bdd98d64 SHA-256: 332ac95dc69c158bdc4f46d4fb1e55fb489c9025f81beab828d7c0f7f10b81c8
204 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The document contains numerous links to external sites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure and instructions for a password-protected archive further support a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18429578336.pdf In PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/69a7e0b7a1b11b2d88eb8786f4f02a56/65316159265.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/ef50d598f050e20bc97d69eb58488ff2/juzagituximew.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/98284925648.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c3ef4c9d4---zoluzovaxadukonebaki.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5881ce888---87409187312.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/82988945939.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/dadojigofuxuge.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/semiruwodi.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/f46206288d14c9d421801ab8928365fc/sofilaka.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab6c7bc6dd---94960473789.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a17d2f84---40676968810.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/vibibesidedapef.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/78543104363.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/23278252964.pdfIn PDF document text
    • https://etadelloro.it/images/file/73401832558.pdfIn PDF document text
    • https://m3csrl.com/file/10482173737.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/bc173d1ee5b456e70d2709e58851cdba/88344611187.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rjk142i784vcdvk1vpnd5eajb0/lesawinakeguwo.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210801125801.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0acc34331d669177fe723d0db6c64451/31215793122.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700bd73a214---88148015340.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a837496c0e---70352834435.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/0db0265ce6916e53f6a72608fffec364/vakowuvelalowugikurip.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/98f633806f27a89de711c9892291dcec/begarogekuwagen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=adobe+acrobat+pro+2017+crack+redditPDF 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_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 10748 bytes
SHA-256: 264f2b7ee99136bf6067b04c95e321e3c87240942716a76708e07541375fff3d
font_01_sfnt_off000106f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F7 17224 bytes
SHA-256: 29ddfb70e4a8728def9530c595b0526c268987b60e8b971fb6b2960b50560c79
font_02_sfnt_off000133e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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