Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f44627465c0778…

MALICIOUS

PDF

67.5 KB Created: 2021-03-07 17:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f40614ac7b41ba898dc6854b90b3b274 SHA-1: 8db231accff63237c06d6265fcc83ecea6ed87ac SHA-256: c3f44627465c0778f47a737d50acba45357a5ac0d9eca4f534a323d436271af7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9093

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 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
  • 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://resalured.ru/strik?utm_term=2000+chevy+silverado+1500+trailer+wiring+diagram PDF link annotation
    • https://cdn.sqhk.co/mevutaxisut/fBIibai/video_ringtone_app_for_android_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423428/normal_5ff2e5ae7c59f.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/7hai6G7/10553327739.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/jbgj3ib/fallout_shelter_ps4_cheats_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417403/normal_6002c183a8728.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/misoferija.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/zevafimi.pdfIn PDF document text
    • https://xobawaxotax.weebly.com/uploads/1/3/1/4/131453143/4487628.pdfIn PDF document text
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/nelemad-zomomutovo-pizebapobiri-zivabibupeteviw.pdfIn PDF document text
    • https://guxuxexor.weebly.com/uploads/1/3/0/7/130775085/pegukakos_jetesuwawaz_ximumawexusu.pdfIn PDF document text
    • https://luwusimoxoxaxa.weebly.com/uploads/1/3/1/4/131453453/rugaxekumuru.pdfIn PDF document text
    • http://reduslim-officialsite.site/how_long_to_use_vicks_steam_inhalerua458.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/402067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcc2f0267644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_6021502b13c1a.pdfIn PDF document text
    • http://masterpowerpoint.com/62761516695mgfv0.pdfIn PDF document text
    • http://triple-doska5.club/520211414340a29p.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/iihOAIl/12358521252.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/1eiigii/king_hearts_queen_of_spades.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/zunewidimem/introduction_paragraph_worksheet_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/how_to_remove_needle_jet_from_mikuni_carb.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 5960 bytes
SHA-256: 23f3d646bfb71bd7369c164744aaaf9fa843688313f597731a71ebc6ff7192c5