Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1a4761a9e8aa80…

MALICIOUS

PDF

68.0 KB Created: 2020-11-14 10:07:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ed7d3b8e4d9238d5d8456d8c23426e SHA-1: d2920fd25a56a6849ddd4d18022f2d8b995a8e51 SHA-256: 7a1a4761a9e8aa80a78cde17a545480cac67dcf58688ac20f99d9d53e6ff247a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'free venn diagram template editable word'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/aws?utm_term=free+venn+diagram+template+editable+word
    • https://cdn-cms.f-static.net/uploads/4385030/normal_5f93b6ada5ae3.pdf
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/d048fa9b6.pdf
    • https://cdn-cms.f-static.net/uploads/4415962/normal_5f96491781e9f.pdf
    • https://cdn-cms.f-static.net/uploads/4416929/normal_5f9db10aa05c5.pdf
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/fuxol.pdf
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/pivutufufisi_supofuzubi.pdf
    • https://vebunigujop.weebly.com/uploads/1/3/4/3/134367951/9703473.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jenagubadopi/el_manifiesto_del_partido_comunista.pdf
    • https://s3.amazonaws.com/gifiz/format_calendar_java_8.pdf
    • https://s3.amazonaws.com/susopuzupure/baby_names_book_in_tamil.pdf
    • https://s3.amazonaws.com/vavale/zunevavamovozikusume.pdf
    • https://s3.amazonaws.com/kelageketisefuv/jungle_m_biome_id.pdf
    • https://s3.amazonaws.com/muvarelo/jojo_part_5_episode_15.pdf
    • https://s3.amazonaws.com/buganabowumujef/gunekulovojitawibasi.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_off0000cf75.bin
5b383c5a04d071aa728cc785928776ab75097ca55b3cadddff0acff1baefc3b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF75 5348 bytes
font_01_sfnt_off0000e1a1.bin
c2b3966cf7ad8cbb2b7887837b74879e771e267b0bfbc22332d0697f5a471336		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A1 9768 bytes

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