Malicious PDF — malware analysis report

Static analysis result for SHA-256 29070b598387f1b6…

MALICIOUS

PDF

118.5 KB Created: 2021-04-08 04:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 60ea6866b84d6a7a8822515bff8453da SHA-1: ede661ac3f9205ead1ad216fd388ba9f36fbf028 SHA-256: 29070b598387f1b635fee3f75a27f547bc36fa1b926a2c399859201526ff9699
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL associated with phishing and link farming, suggesting a lure for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords like 'exception_access_violation windows 10' which are likely used to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/wix?keyword=exception_access_violation+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5fd3a4cb9188b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_603b338cc5c9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_602a2abb5afb1.pdfIn PDF document text
    • http://nutristrike-shop.ru/6mm_aluminium_sheet_cut_to_size6t6yv.pdfIn PDF document text
    • http://numitoredewatam.iblogger.org/57757219816.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/g6nWVji/88529112400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474169/normal_6051354fb4a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_60468b9da9317.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/d5cij2g/42320114162.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/Ojdswpu/systolic_blood_pressure_definition_medical.pdfIn PDF document text
    • http://skameyki.club/xiruxibatilupozvldo7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_6052b12f7053e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_605830fdcdfde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_602cb35e87fc1.pdfIn PDF document text
    • http://fewomazojuxed.iblogger.org/sojapabekogakimelukose.pdfIn PDF document text
    • http://pifopusilegazo.iblogger.org/convert_to_editable_word_document_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fd039575056d.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/6hcgehh/anthropometric_measurement_techniques.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/jORt532/73843768108.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://s3.amazonaws.com/zowibatev/berliner_platz_neu_1.pdfIn PDF document text
    • http://kumobeba.epizy.com/niguzimupirerurabepu.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/logitech_g710_keycaps.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_off00018670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18670 5160 bytes
SHA-256: 32cf4a5faa0479d278ba73ca0201d9a196a2ea06085daf1fb4454a8705eb74aa
font_01_sfnt_off00019821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19821 11156 bytes
SHA-256: 9aeb63ec65855c18abb28ba8e43f21b697502accea2c9daa87d0cc11d05aa2f5
font_02_sfnt_off0001bdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDEE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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