Malicious PDF — malware analysis report

Static analysis result for SHA-256 93215afd7d64731a…

MALICIOUS

PDF

76.9 KB Created: 2021-03-16 07:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dd9240f8ecb0a8a8aca435551c40dc5b SHA-1: ec164cbd7e63c746519bbea8391e7cb79dfdc3d8 SHA-256: 93215afd7d64731aae878facbfe838470e9c1098f2cb46d37ccad76821af55a3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, suggesting it is part of a link farm designed to redirect users to potentially malicious websites. The document body, though heavily obfuscated, contains a question that likely serves as a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=when+was+the+first+day+of+school+in+2018 PDF link annotation
    • http://yesitalia.fun/muzakininofapiwelazek406b.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/lOQeCHq/dawotagurozulubegapox.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/jhMhbhf/pressure_washer_hose_and_gun_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/dlAgd0z/20014165206.pdfIn PDF document text
    • http://rukozhop-guide.com/nixafunafezuzudezeropovdkjl7.pdfIn PDF document text
    • http://ozalupa.space/93649182370s3po.pdfIn PDF document text
    • http://keepqifi.site/shadowhunters_the_mortal_instruments_watch_online_freepglmr.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/AEafIjb/9195588881.pdfIn PDF document text
    • http://buloshnaya.site/game_one_piece_bounty_rush_engxzhow.pdfIn PDF document text
    • https://cdn.sqhk.co/lobitukojuro/i3ji7S8/the_happiness_planner_coupon.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/eijeEjf/haddon_heights_school_district_salary_guide.pdfIn PDF document text
    • http://befigter.xyz/zaxupekudegide2ot7q.pdfIn PDF document text
    • https://cdn.sqhk.co/jofomopunaw/ZKWMD79/codespark_academy_at_home_kids_coding.pdfIn PDF document text
    • http://creampiepow.club/dutibapho6u.pdfIn PDF document text
    • http://mostovaya.pro/allegiant_movie_free_480pmmmo2.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hFTSeWf/56595214967.pdfIn PDF document text
    • https://cdn.sqhk.co/ligilitojob/jduANgj/5998323275.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_699a495f932d4f6da3b84ad56fdf9232.pdf?index=trueIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_3890574a82ae4dd7b65dc53af9f3825d.pdf?index=trueIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_16bd55c0176e400f8e017b0b455e33c9.pdf?index=trueIn 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_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 5836 bytes
SHA-256: 4108649c403d8fe348cf7bdbd05138e19b59c7734e2d5e3579fc7732cf4dc602
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 10960 bytes
SHA-256: 4c7e6121a555c75404d59ccebb9d3acaaf08f1ec256f4b2ebf91bb48e3597c80

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