Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86c4ae8d52b1539…

MALICIOUS

PDF

61.7 KB Created: 2020-12-15 15:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 06bafa9f52f5dbb3a3adcc2990edd944 SHA-1: b65675e3f329adf17fb934e7b5d3a5661bbade03 SHA-256: e86c4ae8d52b15391ddc1193628ad2d86c715730eab9786200b1422f5ecb3c57
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic indicating it's an SEO redirector link used for phishing, disguised with an image lure. The embedded URL points to a suspicious domain, likely serving as a landing page for credential harvesting. No scripts were extracted, but the overall structure and heuristics strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=appian+way+pizza+recipe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f9c14c50c653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f874012d2fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_5fa7c79fe3847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f870eaf94c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5f9a3d5f1bc84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447085/normal_5faf287612dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444638/normal_5fd844dea4678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5fac60162bbe4.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/d6e8e298-ac18-4551-8275-b4bf5f24e45a/dazuvebekusofarom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27aecc14dfd36fefb8ed8/t/5fc8c2ad4b97230d0514a29c/1606992557648/police_motorbike_driving_simulator_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb4a374-e3d6-4131-8ab7-1f4cf929350d/fovovajuvabinajabunaxizo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf67a83c6ccf69f356a578/1606379433760/lil_boosie_daughter_age.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7aaed2122570d5803980a/t/5fca476d8d0ac92c7beee369/1607092078135/74898417930.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_off0000b544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB544 4948 bytes
SHA-256: bc966949ba9928c3d5d7687e9c09eac29a0f21c53fd9acff9ecefcc6660ec2c8
font_01_sfnt_off0000c64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64D 10380 bytes
SHA-256: fcdf420085587b3764403374f24f0fc0c12b953e5b15cebf42a84eb15fe5f999

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