Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42ce3b29d485814…

MALICIOUS

PDF

83.3 KB Created: 2021-06-30 11:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b4cc8c5cc3d96758dad106e4320f33da SHA-1: dabbb3908333df304ff7f6ddc517f2ead6dba7ca SHA-256: b42ce3b29d485814696548cc9c108ba2a3d265ae106e68506b7ca9ef9196095c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that exhibits characteristics of a phishing lure, as indicated by the 'SE_INVOICE_LURE' heuristic and the numerous embedded URLs pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly suggest malicious intent. The document likely attempts to trick the user into clicking one of the embedded links, which could lead to a second-stage malware download or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://laborke.ru/uplcv?utm_term=risk+management+and+internal+control+pdf PDF link annotation
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e7d0da565da6d19d9c9dca67f9620018/37042434372.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7e7d1c36ad737265f2a2be1f954df039/tutajatip.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/36175967629.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aba753bcf62---88722432776.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fc0ea5984---xekagibixetuxonalubu.pdfIn PDF document text
    • http://absigorta.come/file/gukedove.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/08871b8c734ad03e6031699d88bc6a07/41225250749.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/44669336662.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/95731454462.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/28804154058.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/34828654309.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083592f54d8c---95293695557.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/nanobufenobebu.pdfIn PDF document text
    • http://charivne.info/images/file/pabojefimitofawaweg.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210523172633.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dv74aavae5a4mgv8l2lchk1j63/vodolasitizeduwulil.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/32011233159.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/naxenusurosukutive.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/51828984005.pdfIn PDF document text
    • http://esistore.be/userfiles/file/47704574190.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/43673457115.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C5 15716 bytes
SHA-256: 295c02cb392641a12706e7bd71bce60b950fca8af5e8867113c1d6ce8dd570ae
font_01_sfnt_off00010e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12642 11100 bytes
SHA-256: 426ff60aefe015c0ad1b652183fae0f86dc44e5e5b779ce2bfaf3cdb2ccfbf7f

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