Malicious PDF — malware analysis report

Static analysis result for SHA-256 3beccd0c0e677420…

MALICIOUS

PDF

76.7 KB Created: 2021-03-05 01:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 28b316607fcb28a75c068aafc6222db8 SHA-1: 33e9dfc4c05ef3d2422eb1b01b9441c780711c2b SHA-256: 3beccd0c0e677420b40770876ddb05b99f3027afff69393169a3f894a3962978
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure points towards a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://maypoin.ru/strik?utm_term=the+good+girls+revolt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387581/normal_600feb3610d44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462992/normal_5fcc0d761a858.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/what_is_a_synonym_for_chance.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/jfjcjc9/65198796402.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/tagegop.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/sulatuvajaniton.pdfIn PDF document text
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/2683802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416131/normal_60003534d1720.pdfIn PDF document text
    • https://matasomorat.weebly.com/uploads/1/3/4/4/134492922/wetezerenuvu.pdfIn PDF document text
    • https://sadaxolofomet.weebly.com/uploads/1/3/1/4/131453623/leret.pdfIn PDF document text
    • https://tukadivi.weebly.com/uploads/1/3/2/6/132695248/8466833.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/hijfkw5/japan_auto_spare_parts_qatar.pdfIn PDF document text
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/kuvopogamimibivaz.pdfIn PDF document text
    • https://zesajuletolif.weebly.com/uploads/1/3/0/9/130969916/tesasapojebafune.pdfIn PDF document text
    • https://zemedabumudog.weebly.com/uploads/1/3/2/7/132712209/551545574f12379.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/Nsicghe/clash_of_clans_wikipedia_indonesia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368956/normal_5ff9e94cbe2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_600c38cc9b464.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/systems_engineering_masters_penn_state.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widifusi.myartsonline.com/migagabepavijipifewexa.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_9db1b2a196ff44868162027007d9149c.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_eebfb548a0854bb3af552915fa28704d.pdf?index=trueIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_3173c547010d4a168b92bda73509aa23.pdf?index=trueIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_31793bc377dd47358cb499f7a49e4847.pdf?index=trueIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_3458b75b2d5a4402abc758ab148bfd42.pdf?index=trueIn 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_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 4884 bytes
SHA-256: 7ba217a0edd0230d08091c063ecbe353b29cb13f2908882df2cf9ed3d77a0a6a
font_01_sfnt_off000100f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F2 10736 bytes
SHA-256: fe655c09929830d4cb110b7baadab32adac6b3175c3cb7e5b563bd0212cf64a4