Malicious PDF — malware analysis report

Static analysis result for SHA-256 baed5eafd3f1d579…

MALICIOUS

PDF

69.6 KB Created: 2021-03-11 15:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f13a0274f610118c1b28e2129ce5c2 SHA-1: bbda6918085555a9bb248503957764cab25c25c5 SHA-256: baed5eafd3f1d579eb148b4c7c8ba8df7d48a35e1ba97cec45a27a52df2e71f5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a phishing lure related to a university prospectus. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=kampala+international+university+prospectus+pdf
    • https://cdn.sqhk.co/posebozej/bjga6gh/73880779916.pdf
    • https://kanolapegagidil.weebly.com/uploads/1/3/4/3/134339460/c27a5f308aae02.pdf
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/8324652.pdf
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/fewewatumen_vivowesajik_sojar_tunif.pdf
    • https://cdn.sqhk.co/mazonixun/Rnmuhhj/ball_balance_game.pdf
    • https://cdn.sqhk.co/nadokikado/Wjbjihg/zamupizusalodexitavikix.pdf
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/semuwukute.pdf
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/xezaxef.pdf
    • https://cdn.sqhk.co/retirijozi/igheged/mugedunuvefujud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rujabepifar/xomefimedim.pdf
    • https://uploads.strikinglycdn.com/files/007942c5-7b11-4492-a5a8-63474c02781b/like_father_like_son_1987_filming_locations.pdf
    • https://s3.amazonaws.com/watajive/18604668148.pdf
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_f03aa8c666ae4788ab8b31ea5064ceb0.pdf?index=true
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_69792d9e8c7940d3a4f934e7f562fe7c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6dc82281-f37d-49f7-93e5-eda69a22bdc8/96763154679.pdf
    • https://s3.amazonaws.com/gurowozenupifi/fopekaremimirafanebe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2e5.bin
946fc1686de3f070d3a2fe82b702111ef501ada83134eb88e1437f43ad0efd68
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E5 5432 bytes
font_01_sfnt_off0000e558.bin
104a9b3735e6a1a770500d200c60faa2eae029f3523b8427d78164e69ae8ffe2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 10944 bytes