Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfca95d02418001e…

MALICIOUS

PDF

88.1 KB Created: 2021-06-30 11:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e4d8c50250e03b6e7102d8ec63d8dbd0 SHA-1: 030f82e20167eee0659b9167bced5deb0f9c3b54 SHA-256: dfca95d02418001ed59475f629fbbbd0e3279469e2c3cc3591e762cc8362ca60
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many distinct hosts and URLs, suggesting an attempt to direct users to potentially malicious content. The presence of compromised CMS upload links further supports this. No scripts were extracted, but the overall structure and URL analysis point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbcec2bc5b---76550165711.pdf In PDF document text
    • http://kibbkw.com/uploads/file/5564998028.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/neremiwim.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/19560502573.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/12243485318.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/17240597308.pdfIn PDF document text
    • http://novichiha.ru/pic/file/88933735788.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/85e37f2e59f3968b9f2ea1ebb894de35/danup.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072348ac7945---59633846903.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/9f7bchmphp5o15e8chgod4o7j5/94690360165.pdfIn PDF document text
    • http://wurbs-hanau.de/userfiles/file/97224858660.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cb7519d97---bexikigimitefofarere.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/vosuwekul.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfbbb401de---13636466794.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c42001345c1---55330147060.pdfIn PDF document text
    • https://airshow-bg.com/file/waxavivejap.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/vazikuki.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6947092464---50143438841.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/xaluvedisifuta.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/xamatesa.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2120a5752d---puzisikapujekujopebebeg.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/popcpga9d0563bnfk2m9j4b2n1/80279087689.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7cff5e472---xifadajuvolazovu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/4fd8a366838165393c7c3c9a5e9080a7/lamimafefam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=my+car+was+never+repossessed+after+chapter+7PDF 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_off0000f862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF862 16048 bytes
SHA-256: 4ba509d1738363b9a226794cad9fdc227780a4b9095f2f9170b1e23d19cc0b35
font_01_sfnt_off00012199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12199 10888 bytes
SHA-256: cc55f726d9ad441ecf488ea0a09143ff8798a5fb397a0419337f064367caf6f9
font_02_sfnt_off00013ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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