Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0fbe6680a1ba52…

MALICIOUS

PDF

70.5 KB Created: 2021-04-01 08:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f91c38523abf497e9d64e9922d91970a SHA-1: 5e86b8906802d3a85220afa92c30c10064a21179 SHA-256: 1e0fbe6680a1ba52b5de7c8c20f53b381f542f2057769a27f794794a578b6f6f
126 Risk Score

Malware Insights

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

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 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 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://vilenefex.ru/strik?utm_term=what+causes+a+ge+dishwasher+to+not+drain PDF link annotation
    • https://memuwumobodedo.weebly.com/uploads/1/3/5/9/135974490/lazajamewoguve.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/iH4gf5m/70487221432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5fd39370c7474.pdfIn PDF document text
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/acb0285e35a1ac.pdfIn PDF document text
    • http://apeech.ru/xulakajabgb810.pdfIn PDF document text
    • https://kixofugowewo.weebly.com/uploads/1/3/1/8/131872146/7766259.pdfIn PDF document text
    • http://chempion.coffee/zuwesutivozopulizobatov8tboq.pdfIn PDF document text
    • http://zootime.store/53845747599ltdsi.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/jyibifp/puvabanul.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/Q7hhgg4/sonic_boom_2014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_5fd805e774418.pdfIn PDF document text
    • http://submonster.xyz/nilovivuxisovizosa5gut6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5ff361cedcd25.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/zegopekuwubibu-mokowikib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_602fa1a7a95a5.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/awkpl2s/creepiest_movies_on_netflix_canada.pdfIn PDF document text
    • http://takipleskazan.org/320464239034yh8e.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/zidosozawok/canon_eos_digital_rebel_camera_ds6041.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/travel_and_tourism_competitiveness_report_2010.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_off0000d901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD901 5276 bytes
SHA-256: 9c9c0485b6aa67bb888837a06ebe4af6913d09c3d0188830b97626e3b85b9bc3
font_01_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 9804 bytes
SHA-256: 8fb4c6cc2c422d43f16cebec2f10553a071e9c613d0ee4c74f32ea894177ad28