Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ecfce8ec336106…

MALICIOUS

PDF

135.7 KB Created: 2021-05-08 19:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d28c0bd5af83840cfa2cb5af7fb2ea96 SHA-1: da0fc510038908c2f47d07027cc82c75d033727c SHA-256: 25ecfce8ec3361061373a321d7c447bf099907715f089828dd8390c1e01e9900
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 0.9985

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://lozipotod.ru/strik?utm_term=the+crown+season+4+episode+6 PDF link annotation
    • http://malanefire.sportsontheweb.net/the_stranger_camus_philosophy.pdfIn PDF document text
    • https://lomowurepiv.weebly.com/uploads/1/3/1/4/131437546/46101ea1.pdfIn PDF document text
    • http://i-men.ru/ap_us_history_test_2020s0zf5.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/90578731603.pdfIn PDF document text
    • http://serdyukov.pro/22017829093lrzrd.pdfIn PDF document text
    • http://itravelgr.com/3.5e_monster_manual_3l40c6.pdfIn PDF document text
    • http://strgb2.ru/3697647010396fhy.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/958858567171302y.pdfIn PDF document text
    • https://xemizumelisiga.weebly.com/uploads/1/3/1/8/131856695/sisew.pdfIn PDF document text
    • http://xejelofewi.mygamesonline.org/telugu_calendar_2020.pdfIn PDF document text
    • http://uscreditreport.info/how_to_identify_fedex_tracking_numberdbpzs.pdfIn PDF document text
    • http://kartaidatodemeleri.com/missing_value_auth-url_required_forgmvh8.pdfIn PDF document text
    • https://ruvedusipokowu.weebly.com/uploads/1/3/0/8/130813644/fae8e1646ec.pdfIn PDF document text
    • http://fsbsiod.com/milady_cosmetology_book_chapter_29b73bb.pdfIn PDF document text
    • http://sojarenenu.iblogger.org/tamil_hindu_news.pdfIn PDF document text
    • http://ericksandoval.com/lenovo_t430_replacement_battery_not_chargingttcoq.pdfIn PDF document text
    • https://susokeruno.weebly.com/uploads/1/3/4/6/134656617/7161206.pdfIn PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/0be73d26123b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekobegediru.epizy.com/37237466363.pdfIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_3e04d93c1a1a474ab924c6c61ff228da.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_508d78fc3fec4fef8b7b6c9af4febf11.pdf?index=trueIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_d05bbc335e2d4f32adc015ca4f859c3b.pdf?index=trueIn PDF document text
    • http://wagivuxofoz.rf.gd/pigimatireketisafemetibe.pdfIn PDF document text
    • http://pubodetag.rf.gd/degufibenagebaja.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D619 5412 bytes
SHA-256: 83d6950658b8de8db63921f2cedce13e88a403c013b7b87d3393cd1f7513c76c
font_01_sfnt_off0001e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E893 11860 bytes
SHA-256: 8f3bec16c162885e44697e0a34fd5021f8dc9c5ef26cbef863fafa6563e696fb

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