Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0e65f287cb98b4…

MALICIOUS

PDF

84.7 KB Created: 2021-03-30 18:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7d2af591d1fcc144f2c218331072e07e SHA-1: c3ea94612008dc9518491b3f3bd74ef27d96a922 SHA-256: 8a0e65f287cb98b488bfe18e32ee6dffe25340267a2f2683ab7eb873e12f1c80
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting domains, indicating a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, suggests a lure related to technical information, likely to disguise the malicious intent of redirecting users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://botokaw.ru/award?keyword=camshaft+position+sensor+function+pdf PDF link annotation
    • http://tamigome.scienceontheweb.net/ballaststoffreiche_lebensmittel_tabelle.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/23633792539.pdfIn PDF document text
    • http://sadipetuzaw.iblogger.org/97977385620.pdfIn PDF document text
    • http://dixurujisefumet.22web.org/25726734660.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/german_beginner_exercises.pdfIn PDF document text
    • http://zosigar.iblogger.org/how_to_convert_to_editable_word_document_using_adobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_600be27724bfb.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/75055592928.pdfIn PDF document text
    • http://matizaw.mywebcommunity.org/75067700386.pdfIn PDF document text
    • http://xademubizu.sportsontheweb.net/afmc_previous_year_question_papers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422163/normal_604aebd0227ed.pdfIn PDF document text
    • http://raxaterov.iblogger.org/17178678245.pdfIn PDF document text
    • http://dujegud.getenjoyment.net/50733055765.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/gatineau_park_trail_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5fdd9e5e68fb1.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
    • https://uploads.strikinglycdn.com/files/0872c53f-8c62-483b-a254-3616fe42712a/2460_long_tractor_parts_diagram.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/gupugipemitopum.pdfIn PDF document text
    • http://vurorevebosexu.rf.gd/material_safety_data_sheet_for_dimethyl_sulfoxide.pdfIn PDF document text
    • http://rawuwad.epizy.com/corporate_visiting_card_design_vector_free.pdfIn PDF document text
    • http://mupeluzapuwefa.rf.gd/sononejimademareko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead618e4-a07b-4c38-99a5-a02d6f4a4aab/zowixigege.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA8 5268 bytes
SHA-256: a422869837b92c20769aaf5cc77ec3e29e2d64baaeadbb90dfb05be8ddf32f49
font_01_sfnt_off00010f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6F 11000 bytes
SHA-256: 2e959564450bc1e0f78916d27917c5e8c1396c1270340d2f92227c10a18eff38
font_02_sfnt_off00013501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13501 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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