Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ee029e1c45ccf6…

MALICIOUS

PDF

84.9 KB Created: 2021-09-02 15:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d5627d8f1c05c98fc5af303368f50baa SHA-1: ce45fc3fddc88864dccd1f19b0f279bdaf2644df SHA-256: 27ee029e1c45ccf6c03cfd451ac529af7b69221ea76abc17faebc814df733f57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://ketchas.ru/uplcv?utm_term=piyanist+kitab%C4%B1+pdf PDF link annotation
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f86c03cbbd1838d8ea465b2173735eda/rofusomur.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/jobujakivizoraxorogode.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c546c65f7---dijenagijidoko.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/vqng6l6s13qfp86qkbr47et3g3/tiwokidipobijomi.pdfIn PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/wilitawezozonobuvelox.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/60039473652.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/55990153401.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/63511365032.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/203180799fde519053b05ea3cde7b96f/dafobuvenubefagilimomugep.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bd2c62d64---86058017241.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a27184285---67899395824.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/fetewazes.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/72129493276.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611c7a52b4879---faneniz.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/lixareremobabes.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/zuxutikoxuzoj.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/38932836558.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/korivumataguxabefol.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/dexagubigofakobidezalu.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/da6e5b6d898959a7fa11eddddef11de5/wewiduw.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/84d9dcff149f74dd4795a84b774858e7/36118029768.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/52941500078.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/davokijumopibopemuleba.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7e724e6bb---19235951752.pdfIn PDF document text
    • http://emeat.ru/var/files/saguditebosene.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/26642336349.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_off0000e1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B2 20600 bytes
SHA-256: 45df18132ad4d69059ce16cca3b6b6b19e59fba97cda0ee693f0ee5ae408baf8
font_01_sfnt_off0001149e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149E 10484 bytes
SHA-256: 7d6030de7d428c7faee9bc1d835acd8b5b92013a9a740320d4fb06cf79c04509
font_02_sfnt_off00012c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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