Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7cc92247981cbe…

MALICIOUS

PDF

84.7 KB Created: 2021-06-01 02:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 750be6f224c2dbe2a8940e130dc6a662 SHA-1: d29a64154f369661efafca943da787fbc2f8ad59 SHA-256: ce7cc92247981cbe81f98d633450b167bdd61955fad700361a9aefac750fca23
136 Risk Score
Tags
free-cdn-ebook-manual-lure

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 image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were directly extracted, the PDF structure and embedded URI point towards a phishing attempt, likely to deliver a second-stage payload or lead to credential harvesting.

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://jumiwimov.ru/123?utm_term=nitrogenous+bases+structure+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470380/normal_605a4aa4b842a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_606697ef247c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483362/normal_606745ef064e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480749/normal_5fdcb407327e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5ff2fee9ee35d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_6014f37a7c1e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_600bd8f3e0ac1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464865/normal_5ffa21c93b213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459175/normal_606ad78dd0ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495390/normal_5fd26b7bd4775.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5feb5154e2e4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_601584193d834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_6041f0890f94a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418479/rukakunisoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e78fc6-d7b7-42bb-8006-c20b810deb40/autocad_3d_basic_tutorial_youtube.pdfIn PDF document text
    • http://veweran.pbworks.com/w/file/fetch/144432354/why_was_the_northwest_passage_important.pdfIn PDF document text
    • http://degenazi.pbworks.com/f/writing_balanced_decay_reactions_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621e02ba-b397-464c-abcc-725011ad97e9/learn_hindi_grammar_through_telugu.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144428598/xujoxalutisalamul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 5284 bytes
SHA-256: d949a78954a17f29ace408ce827218b82c62e184c0b45802bedb1fef7e6c42d2
font_01_sfnt_off0001112e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112E 11236 bytes
SHA-256: 7ceb858cb577c13bab9b2cc5887d7740f22783085f3f7a93b8ecaedf93042ce4
font_02_sfnt_off00013778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13778 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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