Malicious PDF — malware analysis report

Static analysis result for SHA-256 001cabcd526ff043…

MALICIOUS

PDF

91.1 KB Created: 2021-06-28 04:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: da87e2d4c1a960547f047b31370b2d53 SHA-1: dc0404a16faadf86af23fc99b8cc5f88623b2d80 SHA-256: 001cabcd526ff0434441f780747ddb596c84373ea79314c4b220823ada8f83ba
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates the document's intent to deceive users regarding financial transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://inwebjor.ru/uplcv?utm_term=billing+dispute+meaning PDF link annotation
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de8d4aad78---90309252776.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/2c3f64157e1729fe22404d96a1396592/43185669167.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2915b8196a715bb6ad47a0a4715eb49/21970974790.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/dab5c41fb98a708fb76c78187e1bee46/xewisag.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/16068379863.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/e6f9f35da9d5f5a04c3ecc4a519869a0/nizag.pdfIn PDF document text
    • https://computerzone.pk/file/76610676622.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/98707235334.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/jivudumilebawufamakoto.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/43736891164.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce60293a0d---nebuvutaw.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/94i4742n8j6j7evlcdrh4khh6p/nusugos.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/ee4722545b731f33bdda67f6dd63fa7b/xidisisusulobufumulakim.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b4db5cc5a0cdde0734ab3130745b528f/lewopemi.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850e63120ee---bawowogakakirezaromapafi.pdfIn PDF document text
    • https://edcasys.com/ci/userfiles/files/viseduxawinexidot.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/dexamumukomitapebojosagid.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1b9ed634e6e6b15bbf45fc9525975240/duvuno.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/muc27obu6tcjasmres2ql68fj6/ramivulelulukizufijibeni.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/88869123777.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcec88d2f2---34531307649.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c84cb168e3f---votixalefozereriniwax.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c940861878---60523520139.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5510b7d47---towaluterubanugaduzisujan.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15f5f7c275---lupofijixotutojoso.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/spcn1occ2ao9mq4i5clgcd9eq5/rararasoxotamekekusijazoz.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d12309472---42542811371.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_off00010123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001193a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193A 10668 bytes
SHA-256: 651e7cbfbeb62dc91d29064cef3914bcba0cdaabc6c407d7881bc163e252693e
font_02_sfnt_off0001316b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316B 17488 bytes
SHA-256: 1b6579e5c89ae09e232558ca6b5dcf55f0f4ee50bd2867090568160d2ea6eff8

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