Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c6c5e8b8257da5…

MALICIOUS

PDF

72.8 KB Created: 2021-05-15 15:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 60409f70d0f7e21e06ba1c9fc1af843c SHA-1: 0a6a8009f64b9bd4f4462536154ce5b4c21e9082 SHA-256: 60c6c5e8b8257da5848d4f7c5fda7c14372725649c975fac8ab413a7af3c8bd2
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of multiple PDF_SEO_LINK_FARM heuristics confirms this behavior, aiming to drive traffic to external sites which may host further malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ponafet.ru/strik?utm_term=how+to+know+when+you%2527re+drinking+too+much+water PDF link annotation
    • https://gedofulijul.weebly.com/uploads/1/3/0/7/130775434/3957515.pdfIn PDF document text
    • http://prognoz-football.club/anamnese_terapia_holisticaeubui.pdfIn PDF document text
    • http://generalmassage.online/oscar_wilde_death_hotelbhc1c.pdfIn PDF document text
    • http://gogogoinst.xyz/59865928838k20sy.pdfIn PDF document text
    • https://rofokaragi.weebly.com/uploads/1/3/2/8/132815015/1681981.pdfIn PDF document text
    • http://nubolats.xyz/2002_ford_explorer_sport_trac_fuse_box_diagramgb95k.pdfIn PDF document text
    • https://bojurejid.weebly.com/uploads/1/3/4/8/134887271/6120009.pdfIn PDF document text
    • http://thelandofbadideas.com/nuputalulfm3jd.pdfIn PDF document text
    • https://gefaturulabi.weebly.com/uploads/1/3/4/4/134487578/rosin.pdfIn PDF document text
    • https://pejejuwefosewa.weebly.com/uploads/1/3/4/0/134040570/jopesuzi-bebig-nowugop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479691/normal_605f43e94b7e2.pdfIn PDF document text
    • http://present-mag.ru/resident_evil_3_safe_code_carloskbqgt.pdfIn PDF document text
    • https://ziregorex.weebly.com/uploads/1/3/5/3/135351653/xiliber.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/kevajosekotol.pdfIn PDF document text
    • https://solezoxi.weebly.com/uploads/1/3/4/6/134654925/jipafasej-dalidaruz-pozavase-bezozitija.pdfIn PDF document text
    • http://domainlimax.xyz/nesewajoxus7879s.pdfIn PDF document text
    • http://cardioactiveuficiale.site/cartoon_cute_animalsw5aoq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413866/normal_5fddb754ee42c.pdfIn PDF document text
    • http://jakor.pro/85742735548zc95c.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/9633503.pdfIn PDF document text
    • http://pressit.space/bofowoloxudiwiga0b8sd.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
    • https://s3.amazonaws.com/xepululejiwof/jenusiwewuxumir.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/85348361087.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/86638306008.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/ropawemakapu.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/overseas_but_im_only_one_call_away_lyrics.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_off0000d113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD113 5280 bytes
SHA-256: 7a2e4b53d9363745044c1ac5cb52341677cf3ae1567a226a947904d0b7273a21
font_01_sfnt_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 10584 bytes
SHA-256: ecbd04e53fc9e4d8b995f38c0e194b40da93091162af44520c0f9415a4bd7eaa
font_02_sfnt_off000106f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f