Malicious PDF — malware analysis report

Static analysis result for SHA-256 99626ef0f066c941…

MALICIOUS

PDF

78.2 KB Created: 2021-05-08 14:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d2aceed7cd1ff7ddf7a28636fd81b73e SHA-1: 75408f37a7556d474b8d79f2f2e670fd56883668 SHA-256: 99626ef0f066c94124099dd08777a957e7736dc4701437d2d08bc760142156de
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a prominent one directing to 'soxebez.ru', disguised as a search result. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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/strik?utm_term=how+much+does+it+cost+to+replace+a+water+pump+in+a+chevy+cruze PDF link annotation
    • https://putukaxuke.weebly.com/uploads/1/3/1/4/131437363/jitudekolev.pdfIn PDF document text
    • http://legivupipofu.66ghz.com/kuseba.pdfIn PDF document text
    • https://kudoxere.weebly.com/uploads/1/3/4/5/134591480/ponarimisovoperele.pdfIn PDF document text
    • http://neviresutuv.iblogger.org/marginal_costing_and_absorption_costing_worked_examples.pdfIn PDF document text
    • https://zerasogamonan.weebly.com/uploads/1/3/0/7/130775055/b6060e.pdfIn PDF document text
    • http://silikidabog.22web.org/45510687778.pdfIn PDF document text
    • http://makipoduzoru.22web.org/dasuditim.pdfIn PDF document text
    • https://riwozetamozu.weebly.com/uploads/1/3/4/3/134331456/4ce1fff29dec.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
    • http://lobaman.epizy.com/what_does_a_vpn_concentrator_do.pdfIn PDF document text
    • http://vodukipezep.rf.gd/16517911145.pdfIn PDF document text
    • http://felobiziwikegu.rf.gd/62429083301.pdfIn PDF document text
    • http://lezefivupeke.epizy.com/leatherworking_guide_bfa_leveling.pdfIn PDF document text
    • http://noxonot.rf.gd/87536576310.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/19204946861.pdfIn PDF document text
    • http://fojupejededoto.epizy.com/38094217813.pdfIn PDF document text
    • http://parapaxesu.rf.gd/public_finance_act.pdfIn PDF document text
    • http://fisowafoz.epizy.com/ntuc_income_motor_accident_reporting_centre.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_04391586b9124a6b8698c672720ed2c2.pdf?index=trueIn PDF document text
    • http://pujifobekef.epizy.com/addition_with_regrouping_coloring_sheets.pdfIn PDF document text
    • http://bajivuselome.epizy.com/remisefiwomirugunerabub.pdfIn PDF document text
    • http://gafelen.epizy.com/fejozipa.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_ff2ddf8b55994e9086d90d5e303469ce.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE624 5460 bytes
SHA-256: 2b322754cbc55b578411af8cba5a10cf69f4dc91d049d654e1cc591a998f60e4
font_01_sfnt_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 10524 bytes
SHA-256: d7e525511fbfa2f2a09cb0c75971cc5d5da5cdc9172312d48495614310501027
font_02_sfnt_off00011c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C73 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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