Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3afb27e7112ef6…

MALICIOUS

PDF

90.1 KB Created: 2021-04-04 21:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fca1afc2df37f3f710748a144dd596fd SHA-1: 88f06fab96ffb3389fdf4a2ddb307471c1cac2fc SHA-256: 3a3afb27e7112ef68601c52c4187b5c61eccd2748c36a6c466a998ad33181348
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of an SEO redirector URL, 'https://seumenha.ru/123?utm_term=android+anthropomorphic+robot', strongly suggests a phishing lure designed to trick users into downloading a payload. No scripts were extracted, but the PDF structure and heuristics indicate a phishing 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
  • 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://seumenha.ru/123?utm_term=android+anthropomorphic+robot PDF link annotation
    • http://vomoliba.scienceontheweb.net/98564764740.pdfIn PDF document text
    • http://vosojivaru.mypressonline.com/kinetico_water_softener_buy_online.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/assyrian_history.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/wigobexowipal.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/avenue_q_school_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_6009d35f5e376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454426/normal_606540e11260b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_bf4c3e0e23a24071ac647addf1319c19.pdf?index=trueIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_8525e072ff974bd6b980663c95dd028d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/berebeketemavefakedovu.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/storyboard_making_software_free.pdfIn PDF document text
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_94cdb3e8868648e7893f89576e9f70ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julaxel/canon_lide_110_scanner_software.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_7bfdfaad1a59433cbc118485e32dfec5.pdf?index=trueIn PDF document text
    • http://faleferesevo.onlinewebshop.net/book_of_esther_kjv.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/konofisaxasulazonidebew.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/affective_computing_book.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_off00011a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 5232 bytes
SHA-256: 77634145dcd053e331bc50ffdd0c552ddbf81d4b5c14f10ffb27a3def5c17b9b
font_01_sfnt_off00012bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDC 13892 bytes
SHA-256: 6dc8092a1b294157d87c9ddb2a99217eaf9de1d58f92fc191f276c134ee85e97

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