Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9b2fda7c1fb268…

MALICIOUS

PDF

80.9 KB Created: 2021-08-26 10:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9386d16c244043521fb6ca25389ab807 SHA-1: f69aea65d4d2a169b109842f9ea6f0a3e4d545f0 SHA-256: 2a9b2fda7c1fb268972869c692cb8f6e2185fd997abf5cdcef359d7ecaab9ec4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, likely intended to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=the+best+man+holiday+full+movie+free+mp4+download PDF link annotation
    • http://stellar-toys.com/ckfinder/userfiles/files/zogonix.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/bajijo.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/vudafawuzoremosejobaga.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/31a0253e2a88aac81524c91443b52d17/pebozeti.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/30919438b4efdef2984ff1532ef57f41/1611531664.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/dewisono.pdfIn PDF document text
    • https://mahae.hu/files/files/jujaxadikukakosilejidote.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/263q533k9gnqfhtat23tprfpvs/41702215939.pdfIn PDF document text
    • http://zzweien.com/d/files/lekenobavubipodozinibevu.pdfIn PDF document text
    • http://tanasiri.com/piceditor/file/48769371867.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/55874329570.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/83482646191.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/vupfpgvkbgup4qqhdb77s7l00n/repexotenenijatag.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/49574657130.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/piritumuxex.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff7c42bea8---wopawakemeroxepi.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/fukifobotanojavifexurav.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/2d2a71ce6accc870c7d58d30a0fdb3a6/wotaxojotim.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/2253837028.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a6e464e9aa8dc15dd4c8305ad9b30475/feludemerojizeporame.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/govib.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/vezesu.pdfIn PDF document text
    • https://rt9.rspo.org/ckfinder/userfiles/files/zujofutepefosuduse.pdfIn PDF document text
    • 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_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 16884 bytes
SHA-256: 7795cc8d4b5e7c3aa9061c4d9bf4155852b3d858fb4d4b10124180c299d7a250
font_02_sfnt_off00011bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBD 11308 bytes
SHA-256: 2028497a9805ba2cf55f7ad5ad5de2176975562fb026a8e8ae643532b3998eaf

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