Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe0fe60fe0a136e…

MALICIOUS

PDF

82.7 KB Created: 2021-09-22 15:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c690e778ff7658269345681d9fdc0002 SHA-1: 9cc5bcbb6699ef2f5945835da75618cd0b8937d5 SHA-256: 7fe0fe60fe0a136eeaf7320368e73ccfe95caea7178d2bbeb9d0e21c1cddf5ca
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised or disposable hosting domains. These links are likely intended to lure users to malicious websites, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 http://cokhivietuc.webthoidai.com/img-vietuc/files/zajigejivi.pdf In PDF document text
    • http://elmbbq.com/uploads/files/nafibufuzuzanakerudu.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/75328287302.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/rimofodoxazobixad.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/jifodolomononip.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/fokumixegewegix.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/ruzobuwab.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/momufazevejigupemi.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f98670638c---pajoketafukedizuxomimuj.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/33999159789.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/bojavotisimigeparaja.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/gixivewujozigizi.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/92707149757.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16136bd4fe29df---tupupo.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/xigijewoxigogokojidotupow.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/51138221423.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/fevumazibo.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/bapozem.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/tibijipe.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/34d8be6542856f566dc7231b28c3de64/62646483593.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/15333582039.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/45149000385.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/gozupikibawilizikujibosag.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/najuxafigasuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=lok+vyavahar+book+in+gujarati+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE4 16920 bytes
SHA-256: 2413f85b86741618de500d75e0b92ebc62f68dc3111015a26c3eff86c47484ff
font_01_sfnt_off0000d774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD774 11032 bytes
SHA-256: a54aaba1f1de94d58972c2852560516c2cfdc8b25f8e1c1b68d0ee615b94a943
font_02_sfnt_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 20496 bytes
SHA-256: 6a17684f84563b474e3259ad3bc7ff5df8109c69929ff7bf29f25e118c6033ff
font_03_sfnt_off00012424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12424 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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