Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65e28835468a9f7…

MALICIOUS

PDF

76.8 KB Created: 2021-03-26 10:20:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ede54c7602760124e1f54a722c529546 SHA-1: 746b67b934bd2f7c1ce61996781a467c68c47da6 SHA-256: a65e28835468a9f713cdc9754f95f1f789b862b137cd91d73e1b94cb145e496b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/wix?keyword=blackweb+dash+cam+user+manual PDF link annotation
    • http://begetus11ppz.xyz/email_signature_disclaimer_template3l1jn.pdfIn PDF document text
    • http://fajutixosisi.22web.org/puropomafinazapizukovipug.pdfIn PDF document text
    • https://napuvenorabinu.weebly.com/uploads/1/3/4/4/134490891/ff74e772.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/nidatobarobuxojuzi.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/tavunixid.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/rivurirenotifago.pdfIn PDF document text
    • http://pc-remont.website/the_chaser_short_story_symbolsoxmkz.pdfIn PDF document text
    • http://differencecheats.net/shark_navigator_lift-away_professional_upright_vacuum_nv356eol1i0.pdfIn PDF document text
    • http://robertferrell.net/the_missing_link_wrestler_hawaiic1bvq.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/9213573.pdfIn PDF document text
    • http://clebohets.xyz/sentry_safe_117036jdh.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/21089665859clrf8.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/how_to_do_statistical_analysis_in_researchgybzu.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/marimejerebo/villagers_and_heroes_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c25a4d-fe61-48b0-81b0-99773a59de82/22545395213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67950a38-7bd1-4549-9ffc-d74d72e37eaf/80502586271.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/merlon_ottie_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/53515989965.pdfIn PDF document text
    • http://lumipanu.epizy.com/75255263583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63eff5b-3ce6-459e-8fda-3a52fa1acb05/yamaha_clavinova_digital_baby_grand_piano_cvp_600.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/loan_calculator_apps_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/dashboard_template_angular_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7e3ead6-00ce-4e99-a275-8e583fd7bce5/kotisozumiramepidufepaba.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_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 5524 bytes
SHA-256: 9112bb55ff9a6b5285e796b23c9e2be66ed7a31776ddcad7d78180b5fcfe60c7
font_01_sfnt_off0000fdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC6 11204 bytes
SHA-256: e0e75448619c5d305603c4af592efc0cea1d3f2a219ba0404f8f6fd6d465b32f

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