Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f87ffa6a18b85b…

MALICIOUS

PDF

75.4 KB Created: 2021-02-27 08:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 370a22d3dbc48510b69419ce64ca037b SHA-1: 822df744bccbca04e10f521420b52924eeca0c4f SHA-256: d4f87ffa6a18b85be938ba8437632122409883c93890ca6b26832fb1d0573910
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous embedded URLs, many pointing to disposable hosting, and one specific URL, 'https://maypoin.ru/strik?utm_term=good+credit+score+experian+uk', is highlighted as a potential phishing or redirection target. The document body, though heavily obfuscated, suggests a theme related to credit scores and financial information, aligning with the 'SE_PAYMENT_REDIRECT_LURE' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://maypoin.ru/strik?utm_term=good+credit+score+experian+uk PDF link annotation
    • https://faxororawanemo.weebly.com/uploads/1/3/4/2/134235350/6706691.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/febo_flame_electric_fireplace_model_number_zhs-30-a.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/850672.pdfIn PDF document text
    • http://jedadenawesezo.iblogger.org/pizofije.pdfIn PDF document text
    • http://setifol.66ghz.com/badlands_12000_winch_manual.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/tikaxebirekom.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/bcjdgeO/filatipudukibizuta.pdfIn PDF document text
    • https://wifonofiwi.weebly.com/uploads/1/3/4/6/134636358/7453242.pdfIn PDF document text
    • http://nalowisep.22web.org/18465680240.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/jumedemimo/98933230243.pdfIn PDF document text
    • http://kamegowemegoguw.rf.gd/zekevazibalozol.pdfIn PDF document text
    • http://sonunetenigido.epizy.com/xibedonel.pdfIn PDF document text
    • http://tasukifuputuf.epizy.com/argos_egyptian_cotton_bath_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/the_lord_of_the_rings_cast_hobbits.pdfIn PDF document text
    • http://serumisa.epizy.com/watekasiriwinifovul.pdfIn PDF document text
    • http://viladanus.epizy.com/xiwisidajomomexe.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/jejowikema.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/almighty_coach.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_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 5200 bytes
SHA-256: 822139ed6cd19cd2287e09e7eee5be665e08e5dc64c944239ad7fad991f133f2
font_01_sfnt_off0000fc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC60 10716 bytes
SHA-256: 692f6d505364d276c34caa64577c14e49ec510da2bddbc4d0bd9b5d39171466c

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