Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a4c82baa58e413…

MALICIOUS

PDF

77.5 KB Created: 2021-03-09 03:34:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e0c49ac02c820530239463e114213b5 SHA-1: 964953118a664da52ab667aeec24ba7d2693ab56 SHA-256: 34a4c82baa58e413598191201dad9754066a9926551702f26eecbf610623b4a7
186 Risk Score

Malware Insights

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

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 0.9996

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://baarspo.ru/award?keyword=weekly+schedule+template+pdf+free PDF link annotation
    • https://cdn.sqhk.co/mugejufunij/fhIHhd2/sitting_room_chair_designs_in_nigeria.pdfIn PDF document text
    • https://tifizadidamoz.weebly.com/uploads/1/3/1/3/131378816/861a1d78f33693.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/igfU2HV/30501056376.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/7005442.pdfIn PDF document text
    • http://avto-document.site/35553189735goo6d.pdfIn PDF document text
    • http://ersoil.fun/13629866845jwl4r.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/5EijBgd/jovukanutowa.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/jeiczjj/kofemig.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/ZH0hhBk/69848385729.pdfIn PDF document text
    • https://jositaloj.weebly.com/uploads/1/3/4/0/134042718/6aa00f.pdfIn PDF document text
    • https://situzofunuk.weebly.com/uploads/1/3/5/3/135305293/poxofexuriwelod_lusawinujawal_xurosub_felidabadet.pdfIn PDF document text
    • https://folugaso.weebly.com/uploads/1/3/4/5/134503816/fomanede_kosisobatuzamij_duvagaf_muxobilobu.pdfIn PDF document text
    • https://cdn.sqhk.co/gewigerajoru/cgjg1hj/kobugumelivusaxarod.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/6513027.pdfIn PDF document text
    • https://mofomajem.weebly.com/uploads/1/3/4/3/134349017/jisajis.pdfIn PDF document text
    • http://copyrightshelpcenter.com/how_do_i_turn_the_alarm_off_on_my_g_shock_watchhtlvi.pdfIn PDF document text
    • http://remontvorot24.com/2002_vw_passat_owners_manual4rr7o.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/nerugiraxura/glioblastoma_multiforme_grade_4_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/9591446081.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/how_did_the_american_revolution_affect_farmers.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/bradsports_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/59036804061.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_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 5576 bytes
SHA-256: d30adb2004b58869424b0f8f2dba6525cd332a66c5cadd4cd4632d83b6982c53
font_01_sfnt_off000105e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 10160 bytes
SHA-256: e28118c2e400e7e8956ffc141d5b0bcbabbcd89fc81795e8aa2fccccd9012140

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