Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d72c8678ce38a6…

MALICIOUS

PDF

75.9 KB Created: 2021-03-11 11:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eec1a407ca7f5cff77fe9d166bf3c602 SHA-1: afbea149bb810010b0b8edfd16fa7d8e0f3e0589 SHA-256: a5d72c8678ce38a60261fdf0394ceeb14e19493b9d38128c9ecae9163042de96
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=capitalism+advantages+and+disadvantages+pdf PDF link annotation
    • http://cardioactiveitalia.site/kick_frenchcore_fruity_loops33944.pdfIn PDF document text
    • http://nexipufogavajid.getenjoyment.net/the_search_for_abraxas.pdfIn PDF document text
    • http://snt-br.ru/what_is_the_plot_of_thank_you_ma_am_by_langston_hugheszxe57.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawitaxug/NMtEDjb/oreo_milkshake_recipe_without_blender.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/eigMG2s/drag_battle_racing_hack.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/litikusedoj_xexinokas_kebedajusuge_lokefivojet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xolevusafo.myartsonline.com/letejutorakaratekiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e809b76-8f28-4feb-a606-ccb9084fa098/bonif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44a4519-b8d9-43d2-af84-f68a670f9629/serelununo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/878ee343-45e2-4992-800e-49bebac580e1/mujupasaxupupida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa2bc6c-cdd8-4bea-8a69-9646883db185/77008526036.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://scripts.sil.org/OFLIn PDF document text

Related samples 4

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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5028 bytes
SHA-256: 85c247a5d52b61607719cda62a7a286878a6faad9802808c83013550c1cf261b
font_01_sfnt_off0000f052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF052 10492 bytes
SHA-256: b0bededbb0f424be411f0f82bec1956f2e104cdff4a7ef83816b5706d7a71490
font_02_sfnt_off00011424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11424 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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