Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7148b29ea07219…

MALICIOUS

PDF

79.1 KB Created: 2021-04-12 01:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 80960fa2d35a226162385ac0dabb4b4e SHA-1: d741b8ee86006612bb7b57d93d1c83447bd3dc5f SHA-256: 4d7148b29ea072193c8bbae79e3f7dd2e98c417c4b8c9c6bba58d333e74a4bb7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=homelite+2700+psi+pressure+washer+ut80993f+manual PDF link annotation
    • http://antinomi.design/78671872457o8o8r.pdfIn PDF document text
    • https://zugavugusalozi.weebly.com/uploads/1/3/0/7/130776271/bidetuvogejen_gaxuzejabe.pdfIn PDF document text
    • https://solubowobadiwu.weebly.com/uploads/1/3/4/6/134642134/289573.pdfIn PDF document text
    • http://qwert-ita.fun/98237520386fxti3.pdfIn PDF document text
    • http://geleostone.online/integrated_chinese_level_1_part_1_workbook_3rd_editionow464.pdfIn PDF document text
    • https://sewizafisebe.weebly.com/uploads/1/3/1/4/131437566/temifevimus.pdfIn PDF document text
    • https://roguvajodanuk.weebly.com/uploads/1/3/1/3/131379692/nifikuzod.pdfIn PDF document text
    • https://wenuzivubog.weebly.com/uploads/1/3/5/3/135392435/porogugigiga.pdfIn PDF document text
    • http://keto-s1.com/anthony_quinn_zorba_the_greek_quotesv35v3.pdfIn PDF document text
    • http://mpvideo.org/how_fast_is_the_2020_camaro_zl1lwruw.pdfIn PDF document text
    • http://lifokuvaxodime.iblogger.org/vezevore.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunapelivoguga.rf.gd/xakisipetem.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/cell_biology_and_genetics_notes.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/bmw_x1_2020_owners_manual.pdfIn PDF document text
    • http://vikuladaputak.rf.gd/ar_15_handguard_removal_tool.pdfIn PDF document text
    • http://valogaberel.rf.gd/brosimum_gaudichaudii.pdfIn PDF document text
    • http://xibunagevidaze.rf.gd/tataki.pdfIn PDF document text
    • http://kutepiguzusudax.epizy.com/bovibiruvufid.pdfIn PDF document text
    • http://ritebumisopa.rf.gd/nesezuguvomed.pdfIn PDF document text
    • http://waxetip.rf.gd/kaziwisivuliwovidosapava.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/2013_honda_civic_owners.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_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 6060 bytes
SHA-256: 87489785eb591666355b0847e89414a891850b245b1608d129fcde7980a42013
font_01_sfnt_off0001098a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098A 11124 bytes
SHA-256: 6b6d948acdafd0cd7cb810a115e98c9b01f066afc78fce39d8a1630342e2cb37