Malicious PDF — malware analysis report

Static analysis result for SHA-256 44384915793d1cc0…

MALICIOUS

PDF

71.0 KB Created: 2021-06-11 04:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 65568e37c69d40d128e9f5fb5e891dac SHA-1: 256c99ccfcaa289f99edb5a2526da4a14724fa21 SHA-256: 44384915793d1cc079a7d9318fa7d727d4751d284f021846053341e77ff5df07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to compromised WordPress sites and other domains, suggesting a link farm designed to host or redirect to malicious content. The document body, though garbled, contains keywords related to downloading files, aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://oniceh.ru/uplcv?utm_term=free+fire+unlimited+diamond+zip+file+download PDF link annotation
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/5ora36ueef2mnv6a3mpj8o98st/febodukewufafupodanid.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/gisuledafifobunemef.pdfIn PDF document text
    • https://andrejc.si/files/file/86102607418.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/59091572313.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/499ee4c16ea611ccfa43c738401a4100/piworugaj.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/rirewonuravovoxisaso.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/ganidejab.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/pajugoxe.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16075f10455b5b---41232683687.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0eb0f33cd1---webotafusovawiso.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/kgj8ecbf84ln6bqltlv2bras66/35783817936.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/18983977427.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/ef8fefd0721b1225deb6df112244d26e/jinugepekijusufuzovu.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/1c62d4929289567e6ff7d2aa2a5c5e75/latabileliwivaxumoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 5104 bytes
SHA-256: a92187f7cc463dc745d82f71f5db5d4185aefc19194dcd1e177e6770b80a8b6a
font_01_sfnt_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 10716 bytes
SHA-256: abac0cbe2c1c459b06f00d3a41172cf1bcf5eb513b91231c763291f9f917dce2

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