Malicious PDF — malware analysis report

Static analysis result for SHA-256 caffb7cfaf763bc4…

MALICIOUS

PDF

76.1 KB Created: 2021-02-14 11:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 392e7dcd00735bccf51fd8e1b441f143 SHA-1: c2982d42bdc05d357681f3968374e8387a89b286 SHA-256: caffb7cfaf763bc4a1c9f44db05fb51d49308da51c335bf1874e3272d9a168ba
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an SEO redirector to disguise the malicious link. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a domain associated with phishing, likely leading to credential harvesting or further malware delivery.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/wix?keyword=effects+of+the+vietnam+war+on+american+society PDF link annotation
    • https://cdn.sqhk.co/jeporikate/sk4Nhjb/best_tactical_knife_with_glass_breaker.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/fsNgipp/tobej.pdfIn PDF document text
    • http://lnstagramsupportlives.com/fosefeecrz8.pdfIn PDF document text
    • https://cdn.sqhk.co/gafokoru/Ckljdhg/zuvizamuditalebiso.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/giegBfY/word_365_online_text_box.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/gfgi2ji/21952737685.pdfIn PDF document text
    • http://lunamawel.22web.org/kaabil_full_movie_hd_filmywap_2017.pdfIn PDF document text
    • http://kyponnik.online/adobe_livecycle_designer_torrentii7bl.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/chigeHN/kilenopomuvesox.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/dvzCGgg/pilot_mountain_state_park_trails.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/dgegda5/vinatolukanobotowijubi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeputujakajaj.epizy.com/atorvastatin_davis_plus.pdfIn PDF document text
    • http://poxabeb.rf.gd/toronto_police_service_east_collision_reporting_centre.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/oriflame_catalogue.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

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_off0000ed81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED81 5300 bytes
SHA-256: b2127c72af54ae9d39a8c19a4ec1127741d73cbec236da5a29d538ed8a3614b7
font_01_sfnt_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 10492 bytes
SHA-256: f2abfffd37ce557fcac57939aa4a6020bd0367376732bd2f3b717057efd4e5ad

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