Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c245712b15c2c3…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 00:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 05a5b62bca56bef43a357db3777e7ac1 SHA-1: 96ac01df74fbb535a8aa02ae917e71d963a7c783 SHA-256: c0c245712b15c2c3558ff433a2fe1296c2a6146ab0e5368277b501b6df915b9c
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 0.9998

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://dafemum.ru/wix?keyword=alabama+tea+party+voter+guide PDF link annotation
    • https://cdn.sqhk.co/mobubivifa/Bgggijh/who_won_the_pba_bowling_tournament_today.pdfIn PDF document text
    • https://zewevenetox.weebly.com/uploads/1/3/4/4/134477768/xibexizirakurij.pdfIn PDF document text
    • https://wadodimimilupe.weebly.com/uploads/1/3/0/8/130873890/8315473.pdfIn PDF document text
    • http://item-mask.top/download_film_pengabdi_setan_google_driver085y.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/4ZhfYlH/billboard_radio_china_live.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/hXunKWo/rutizapaganoxegalu.pdfIn PDF document text
    • https://gepepokomireke.weebly.com/uploads/1/3/4/8/134892048/7ed14d040d.pdfIn PDF document text
    • https://cdn.sqhk.co/sewetotab/khjgi60/fancy_name_for_blue-_gray.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/jahcgiv/painting_pumpkins_ideas_easy.pdfIn PDF document text
    • https://wosexepipoto.weebly.com/uploads/1/3/5/3/135347387/mimem.pdfIn PDF document text
    • https://cdn.sqhk.co/dagizonu/jidgjz4/rijonadefan.pdfIn PDF document text
    • http://pidijajuwupurop.medianewsonline.com/icao_annex_14_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xivijela/jdtXyjg/fun_facts_about_dogs_noses.pdfIn PDF document text
    • https://gavuwexis.weebly.com/uploads/1/3/4/7/134772394/ea421.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/likilanewet.pdfIn PDF document text
    • http://idealslim-ordina.site/kevadixosamuninosadalequsbh.pdfIn PDF document text
    • http://yozi.store/quadratic_equation_standard_form_to_vertex_form_calculator5j2ut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tiredosutozol.atwebpages.com/ancient_greek_olympic_sports_ks2.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/girugekupebanirugej.pdfIn PDF document text
    • http://pebomotixot.myartsonline.com/how_to_reset_element_tv_remote.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5168 bytes
SHA-256: 770c57f6bb5ee5688e339c3ec73005f8d62dfda362f65179e3308e22b3ce675d
font_01_sfnt_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 11024 bytes
SHA-256: 2fc755ff496af0637aafa19b045fe7be5b41a336550fe65e877a4b2f5baa88f5
font_02_sfnt_off00011e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E42 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378