Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4bba2ac1ce510de…

MALICIOUS

PDF

62.1 KB Created: 2021-02-24 15:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e3034b14989a7551741d23977a6140ed SHA-1: 1b05ee63ba6d5dc54f889db652582a58bcedbdf6 SHA-256: f4bba2ac1ce510de58c83cced129a420f50caf08055de8a23b00b712021c337f
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with a primary URL pointing to a keyword-rich domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO manipulation. While no scripts were explicitly extracted, the presence of external links suggests the document's purpose is to redirect the user to potentially malicious content hosted elsewhere.

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
  • 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://seumenha.ru/wix?keyword=family+barber+shop+duarte PDF link annotation
    • https://cdn.sqhk.co/jojojidatun/ig6ihMi/nalutagejuvafet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_602da79570164.pdfIn PDF document text
    • https://fumamefix.weebly.com/uploads/1/3/0/8/130873833/9720854.pdfIn PDF document text
    • https://waferipesor.weebly.com/uploads/1/3/5/3/135307907/xobegedosutejo.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/iccfugi/wordpress_2020_theme_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/heibNRO/download_game_hungry_shark_world_mod_apk_rexdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369630/normal_6007e728168a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462696/normal_5fdf547eb6fa2.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/driven_free_kick_fifa_21uv8a2.pdfIn PDF document text
    • https://lowaribopuvege.weebly.com/uploads/1/3/2/8/132814272/7142951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444102/normal_5fddfc322bc38.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/hp5ijib/roblox_prison_royale_oyna.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/57b420fd3e109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_5fd12b9fbbe01.pdfIn PDF document text
    • http://airet.space/789725730478zlvr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sasufufa/bylaws_template_for_corporation.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB668 5396 bytes
SHA-256: d26dc8ac85bd05329c9f6a20f48f19101909b9207afab04965a1a03dec5d31e7
font_01_sfnt_off0000c892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC892 10208 bytes
SHA-256: 98099efecd6c57565cf8a23ce4c81ac09df83aa3e131f173d79505437c6d7434

Open this report in the interactive analyzer, or submit your own file for analysis.