Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a00e8c444ca1aeb…

MALICIOUS

PDF

75.2 KB Created: 2020-12-03 11:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: aa7b35f3a61a5758d0295e960810b863 SHA-1: f16bb42f69988a93f1190d79e22b6b52ae80022b SHA-256: 1a00e8c444ca1aebb91237e64a01a1b7ad86a6c40485cfd40e5cdcabe94db8db
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 SEO redirector to a URL that promises a 'free proposal design template'. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards a phishing campaign, likely involving a malicious link or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=free%20proposal%20design%20template%20word PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc64bc08ef7301f8b35bd0e/t/5fc6e8fd93ad1a48120c6de3/1606871294668/305486252.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b91160f2895dc1f3a0a6/t/5fc788e43ac9c763f4dab5f3/1606912229029/54025808184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a91707-64b1-4435-9f43-5692d155f143/11504039481.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28d7517e7202640f4b4d6/t/5fc37c9cf81c9a2a0c0eb878/1606646940796/good_dog_carl_by_alexandra_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4431857-39da-4e43-8092-149306be7979/45001681312.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdd38a3bf4b14aba341ea/t/5fc0ef57bc819f1cf4f9b956/1606479704065/academir_charter_school_middle_uniforms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3ceaa24b06a7eb3118727/t/5fc837606652ad59ec20a48e/1606956898296/kirevofuromenevubifamuzu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b1ef3de5e49b55a73b3/1606372126716/electronegativity_of_carbon_monoxide.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/jejodofilixiwiwajimo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d5a1bd14ff0dd2be64ac/t/5fc638133570fb44d1d661dd/1606826005772/sizedoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb91992-a4f4-4ea0-be7c-b638dc0442b5/83532714461.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/77686825286.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28b4ea13a450babfe95ac/t/5fc8820e90a4f8549d7adcd6/1606976015374/crossing_over_occurs_in_what_phase.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_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 5324 bytes
SHA-256: 12811d8ac45d0c2e3da5961b91a344927774bd2456e0378533addb0171f6d8a5
font_01_sfnt_off0000fb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 10908 bytes
SHA-256: 1d1ff4b184719fdafa73ab9eeef6b7237bfe361dd30bf5ff4b1f6add2d2a561e

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