Malicious PDF — malware analysis report

Static analysis result for SHA-256 883e01ce53c73f4f…

MALICIOUS

PDF

72.3 KB Created: 2021-01-09 12:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e62cd53cd048635f4e0d27478465d359 SHA-1: 38471b58a01cb1ccdd9b1aad76f3dab5ed8ba4be SHA-256: 883e01ce53c73f4f8acb27022128faaddad971f528195b9175bb167412986340
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 is a phishing lure, specifically using an image to redirect users to an external URL. The embedded URL 'https://trafffe.ru/123?utm_term=pho+777+menu+number' is identified as a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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://trafffe.ru/123?utm_term=pho+777+menu+number PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fc9aec6a9c79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449012/normal_5fd1bac1f2e36.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/h9jg8je/run_the_mountain_down_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/96idjcg/sabado_gigante_short_story.pdfIn PDF document text
    • https://cdn.sqhk.co/fidapulano/hhtjcMh/5604876928.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/sgeLhif/2048_number_puzzle_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/eV59Lji/alien_escape_room_newcastle.pdfIn PDF document text
    • https://cdn.sqhk.co/dojatejij/i9gfijO/kesivot.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/f9828558-e142-41d8-8fb7-a129837749b6/color_bumper_plates_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30fc89ba-10de-41a5-8fc3-0319832ac13f/64830486187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd5adbb-8e2e-4ea0-9a5b-8c45ab01c2f1/64339020767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ac4b3c-d51e-481a-8e6d-eb7d6c0b5bad/glencoe_geometry_teacher_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/wifesusunubilozu.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/manifest_destiny_apush_short_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdb8019-22b6-4b2d-81c4-2c0f368d4de5/14330947290.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 4

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_off0000dcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF5 4724 bytes
SHA-256: 05876b84f4f3dc3d321f301be936de0e141496dec70ae929125e791fd8ef8d04
font_01_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 11908 bytes
SHA-256: 6fce438cfe2c41cc63a46d0ddc7601868959e9bb3d3b64b40bf83fd819f37e4e

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