Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba02467703fe999…

MALICIOUS

PDF

86.9 KB Created: 2021-03-31 21:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7ac40d45a6655b052145c16a58d66d5e SHA-1: 533bf302e5b73de2d28624e9505a813a2f780466 SHA-256: fba02467703fe999d4d57c20952a7ab6139cffb3481c4951b2b34da393589301
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely intended to redirect users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://maypoin.ru/award?keyword=ak+khurana+anatomy+and+physiology+of+eye+pdf PDF link annotation
    • http://wildboost.club/bees_saal_baad_movie_1988rfw5k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_60140587e42aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498678/normal_5fc81cd759c68.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/fO5Yie3/toxuroxemewusigu.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/3CjiwVR/37592941646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_5fd3509fe8bb1.pdfIn PDF document text
    • https://sulumakopata.weebly.com/uploads/1/3/0/7/130775191/fozilad.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/dgfkjdL/xekexibe.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/b3Zgeja/gijuwimidemupivaxej.pdfIn PDF document text
    • http://yandex-delivery.cc/figifabudeporipuv0zoe.pdfIn PDF document text
    • http://mirror-x.org/losanelifett33dr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459774/normal_60334e069da63.pdfIn PDF document text
    • https://cdn.sqhk.co/vemosoveveb/MggChbn/indoor_golf_hitting_bays_near_me.pdfIn PDF document text
    • https://vogavova.weebly.com/uploads/1/3/1/6/131606390/nefukegud.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/wjjJBsl/lunavuvuneganij.pdfIn PDF document text
    • http://burrrhey.tech/ahlan_wa_sahlan_textbook_2nd_editionu6s9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b567135f-d418-415f-874a-8b3f4a3ba096/download_foxit_reader_phantom_full_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f607290-72e6-4122-82c5-1cc35cb2e976/kemojaxesaxufejitax.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 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_off0001141c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141C 5612 bytes
SHA-256: a8b4169b46e8d800ce24f9a40a8ed7330b3f70f7208d8d2b023e80d52e43ee0c
font_01_sfnt_off0001271b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271B 10816 bytes
SHA-256: aa0d85b9bb3845fcfd274987c0af651ca59f7974a128d5935f86190834338973

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