Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4cf3b6d7b2bc76e…

MALICIOUS

PDF

68.8 KB Created: 2020-12-03 14:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5a1c8d89f9bb050d56662bb31c7666a3 SHA-1: 9bfbd61a5208ed8c9c8a6dc6b5419c88979d1e93 SHA-256: b4cf3b6d7b2bc76e5153864871197f22333b61abc9eedf27b6b24017f530d50c
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, including one to 'trafficel.ru', suggests a phishing or SEO manipulation attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards a malicious intent, likely related to phishing or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafficel.ru/aws?utm_term=between+the+lines+book+pdf PDF link annotation
    • https://bisawovetazevel.weebly.com/uploads/1/3/4/6/134613631/kesusevimotowa.pdfIn PDF document text
    • https://xifekuvazunavel.weebly.com/uploads/1/3/4/7/134748582/9bcfade283de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf622718e72e5fdbcf9117/1606378025130/count_of_monte_cristo_character_relationships.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0805cd49dd12447321748/t/5fc87409d32d012678fa93b5/1606972432250/poughkeepsie_tapes_based_on_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/35441812137.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/english_grammar_rules_for_competitive_exams.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6bda08845d0924832976/1606380506885/what_does_a_tree_octopus_eat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b42eab79f442f2353307/t/5fc4d5b24e98326c02a92bda/1606735282893/80331491518.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2eceac6d96458362f573e/t/5fc3ee539ee0f32b87ccd853/1606676051757/google_scotty_kilmer_channel.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/home_buyers_guide_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/ba_bed_syllabus_2019_in_hindi_download.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_off0000d193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD193 5168 bytes
SHA-256: 7cb6a2fc9fc2859cdecd1a2aaabcd44de6dea16388de78db3106a1722b4cf9b3
font_01_sfnt_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 10348 bytes
SHA-256: fed2cc77edddcb37139d11801b996e2f845d70e293c5949c67ae1b04f19e354f

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