Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3f3cafaefd7499…

MALICIOUS

PDF

74.4 KB Created: 2021-06-08 18:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a863011d841e63f2ca3dfa3ff4e64070 SHA-1: e3de0f12a85fe0df02ff4e0e0be46bccbd757f9f SHA-256: 9f3f3cafaefd74992dbe90a1e0a424ce6908dfb6fd52a3f3a65711573750536b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm and flagged by ML classifiers and ClamAV as malicious phishing malware. The document body, though heavily obfuscated, suggests a lure related to 'ccnp interview questions and answers pdf'. The presence of external URIs and the overall detection by multiple security tools strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/pbw?utm_term=ccnp+interview+questions+and+answers+pdf PDF link annotation
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/pisofepisigevegopo.pdfIn PDF document text
    • https://jewigilimeb.weebly.com/uploads/1/3/1/4/131408849/5a961.pdfIn PDF document text
    • https://kopigipovivon.weebly.com/uploads/1/3/1/4/131484029/e634427.pdfIn PDF document text
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/dusorajijawilor.pdfIn PDF document text
    • https://vurabagugodemox.weebly.com/uploads/1/3/1/1/131164039/4326687.pdfIn PDF document text
    • https://sezitoxonuga.weebly.com/uploads/1/3/4/8/134886233/wovixe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a532e69-376c-4468-add5-66fb66f27fb1/bose_remote_control_model_awrcc2.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144874746/aladdin_hindi_dubbed_movie_download_720p__50____0.pdfIn PDF document text
    • http://lifuzopa.pbworks.com/f/24939249847.pdfIn PDF document text
    • http://mevuteled.pbworks.com/f/ver_talentos_ocultos_pelicula_completa_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc055ef8-4caf-49c8-a729-317c2cceafcb/premiere_pro_free_audio_presets.pdfIn PDF document text
    • http://pupowivala.pbworks.com/f/jimewososozusagow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38f11a0-4dea-412a-ae90-f5dfc6c9cb95/80188493353.pdfIn PDF document text
    • http://lipovosufuk.pbworks.com/f/kataxanogeb.pdfIn PDF document text
    • http://wudiwiligis.pbworks.com/w/file/fetch/144534762/rusofudonasuluposug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65728623-37ff-449d-bca8-3765d32053eb/81351756458.pdfIn PDF document text
    • http://gaguseka.pbworks.com/w/file/fetch/144672465/how_to_get_50_free_spins_on_coin_master.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_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 5300 bytes
SHA-256: 6b25c6136c3636033a828b32ae6828ec7d5366f871ffd5da1f157b06884115ca
font_01_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 10164 bytes
SHA-256: 7b0358519e3d91cf96bc2efa4af4eabf5c2dad423a96f1bec91756cf71e440bb

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