Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3767ffebfdbcb7…

MALICIOUS

PDF

72.7 KB Created: 2021-02-16 01:39:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0523e8a897bab45904c74b939987b486 SHA-1: 05647e11ce29c42ac5468779c23d3d9dccdfd11f SHA-256: 1c3767ffebfdbcb771b49ee332aa95bb59cc53fb74931bccc584ba28a65b94ae
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, characteristic of a link farm or phishing lure. The document body, though heavily obfuscated, suggests a search result pretext for 'lord of the flies map with page numbers'. The presence of numerous external URLs, including one pointing to a potentially malicious domain, indicates an attempt to redirect users to malicious content. ClamAV and ML heuristics confirm its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=lord+of+the+flies+map+with+page+numbers PDF link annotation
    • https://cdn.sqhk.co/wujakegu/TjgheWJ/super_idle_hero_lumberjack_adventures.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/5436431.pdfIn PDF document text
    • http://yandex-dostav.ru/997106313743985h.pdfIn PDF document text
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/9e3500d6.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/hgqWbjc/supibiwodojivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_5fe62fd368764.pdfIn PDF document text
    • https://cdn.sqhk.co/zerumowo/tghtojU/xeruvugimavesom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_601e98057b6cf.pdfIn PDF document text
    • https://dapiridefurewej.weebly.com/uploads/1/3/5/9/135987432/degosiso.pdfIn PDF document text
    • https://zuvexege.weebly.com/uploads/1/3/0/8/130814851/4bcd867.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/wovigebi/xifamugepavafopisekopa.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/cafeland_cheat_engine_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/hyundai_ioniq_android_auto_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/2013_chevrolet_impala_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/accident_report_template_for_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/wetifiz.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_off0000df3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3E 5628 bytes
SHA-256: 85e3771debcfdff3ff73ca81eacaa42dd005a4302d2a8bdac25c7d44c17c313e
font_01_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 10348 bytes
SHA-256: c6065aeed45e0eda6ce7169aefccb0443f83d130bd440f7209a905916b349409

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