Malicious PDF — malware analysis report

Static analysis result for SHA-256 7651f9b9509c4b42…

MALICIOUS

PDF

77.1 KB Created: 2021-03-15 03:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 118803ab2734c911d3210a05c26f6818 SHA-1: 3c3713433bfc082caa35c15769f256281df77642 SHA-256: 7651f9b9509c4b42de24f0d5903deaf3167a7f3a06f92aaf1baf8c0566486f51
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious and exhibits characteristics of a phishing or link-farming scheme. It contains numerous external links, many hosted on disposable domains, designed to direct users to potentially harmful content. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a large number of links for SEO manipulation, likely to obscure malicious destinations. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest an intent to redirect users to malicious sites, possibly for further exploitation or credential harvesting.

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://mezovuduw.ru/wix?keyword=forsyth+county+road+map PDF link annotation
    • https://cdn.sqhk.co/fivukidado/BIjcjdC/kululoliwatujepawukewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_6030804c5a80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_60391a2bb51a7.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/SiiD6gj/rdr2_animal_map_locations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499935/normal_604507675a0c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_6037797dc4a67.pdfIn PDF document text
    • https://fufarolobol.weebly.com/uploads/1/3/4/5/134597676/nowifutidevox.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/fibul.pdfIn PDF document text
    • https://vabakapis.weebly.com/uploads/1/3/1/4/131453405/zojikaxe_ponijev_zisun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406169/normal_5ff1be3f36da4.pdfIn PDF document text
    • http://ketezuk.iblogger.org/sex_and_the_city_movie_stream.pdfIn PDF document text
    • http://nususolajegak.iblogger.org/painting_effect_photoshop_action_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bipujawojeli/igjexZw/rigotutilegidodixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389576/normal_6002645977f87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kobinegugagikag.epizy.com/bad_tempered_informally_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/megan_fox_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/coway_ap-1512hh_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/thinkpad_t490_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/pneumonia_antibiotic_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/31851612399.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_off0000f01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01D 5336 bytes
SHA-256: 0d09bf985ebc20647518268fafb490e30d536d7350ae0575f3db21f2451966ba
font_01_sfnt_off00010227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10227 10900 bytes
SHA-256: 55eac9b9e33d0d9666fde4d6fd0910c2e5cca8b52b07fad4b8298d444110c30a

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