Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea961d34eb2e7dd6…

MALICIOUS

PDF

75.5 KB Created: 2021-02-26 23:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 34f317e57928ef7332bbc497d896124a SHA-1: b847d81554ab5cfb6d12e9df9bd09278237e382b SHA-256: ea961d34eb2e7dd61c9bdb8ee6ddfb861588fe148bcb05d07ea3cfcc726e9944
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', suggesting the document's primary purpose is to redirect users to other sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or trojan distribution via the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wb?keyword=2012%20chevy%20traverse%20engine%20replacement%20cost PDF link annotation
    • http://usejus.pro/339193415650fc9z.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/7198170.pdfIn PDF document text
    • http://yourcy.com/hp_printer_installation_guide6p0tl.pdfIn PDF document text
    • http://erkutungotu.com/xapuvozugoredec1314.pdfIn PDF document text
    • https://jowetirepenu.weebly.com/uploads/1/3/1/3/131383619/rikiwukanaleki.pdfIn PDF document text
    • http://fastgetme.online/padi_open_water_diver_dvd_downloadwh7aw.pdfIn PDF document text
    • http://kwini-fini.online/tanavepugurabitipotugj7t.pdfIn PDF document text
    • https://pudewufaziv.weebly.com/uploads/1/3/0/7/130739775/9a361.pdfIn PDF document text
    • http://ogranicbio.space/the_fifth_wave_scriptbl68v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fcbe296712af.pdfIn PDF document text
    • https://gavititexufo.weebly.com/uploads/1/3/3/9/133997787/5715b30c681.pdfIn PDF document text
    • http://iciapp.xyz/36643155726edqie.pdfIn PDF document text
    • https://vuxulirupam.weebly.com/uploads/1/3/5/3/135346280/7001474.pdfIn PDF document text
    • https://paterixif.weebly.com/uploads/1/3/1/4/131454766/daxezusakidile.pdfIn PDF document text
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/pobunajevirosu-rurusutod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5fe7c46a8ccfd.pdfIn PDF document text
    • http://wejnpowk.space/nonton_online_from_vegas_to_macau_27egka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401558/normal_60048ef1a7d58.pdfIn PDF document text
    • https://rusuxizebagujam.weebly.com/uploads/1/3/5/3/135302265/5850979.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/setigafat/sbi_personal_loan_application_form_online.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/zekaxuvipal.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/chatsworth_international_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/veterinary_obstetrics_and_genital_diseases.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_off0000e8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E5 5740 bytes
SHA-256: cca939e5e86456933df16a93ba39c39b3b70dd56a65e97629fa23e8f37193d6f
font_01_sfnt_off0000fc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 10576 bytes
SHA-256: de12dab50b6642aa0e5ee343974158295741ae5361a29ff5b49d344469d50c7b