Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4036c33c4a39fcd…

MALICIOUS

PDF

76.3 KB Created: 2021-03-09 12:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7184a7aefed4ddda1f3465350d3455cb SHA-1: ce302f21cf91ae4d88c3bcbad3216c683bafef1a SHA-256: b4036c33c4a39fcdb7cdc00a92523b2beb75bca8244c1b4b99794b643d9364ce
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to 'entrepreneurship skills books'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://dugedepap.ru/award?keyword=entrepreneurship+skills+books+pdf
    • https://static.s123-cdn-static.com/uploads/4499629/normal_5fce5825adafd.pdf
    • http://komaxinatobofe.medianewsonline.com/63245749034.pdf
    • https://cdn-cms.f-static.net/uploads/4414360/normal_601d294826193.pdf
    • https://cdn-cms.f-static.net/uploads/4420459/normal_601ec7c0cc699.pdf
    • https://cdn-cms.f-static.net/uploads/4470224/normal_60183e69004c8.pdf
    • https://cdn-cms.f-static.net/uploads/4470830/normal_603d3214ee3af.pdf
    • http://pavajevubuj.iblogger.org/xagulokixukagubepunane.pdf
    • https://cdn-cms.f-static.net/uploads/4449014/normal_600a4ce64fffd.pdf
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5fdee611e1b58.pdf
    • http://subulowopuriko.iblogger.org/graco_nautilus_80_elite_3-in-1_harness_booster.pdf
    • http://sugameloxufe.mywebcommunity.org/39477559172.pdf
    • https://cdn-cms.f-static.net/uploads/4372963/normal_6025c4cb3f284.pdf
    • https://cdn-cms.f-static.net/uploads/4501356/normal_6047038f6d28d.pdf
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5fe661d9ee0e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wewamamewiler.atwebpages.com/lisogodop.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/77872570912.pdf
    • http://wutejaxevewef.myartsonline.com/xijetufe.pdf
    • http://rozavarixiw.epizy.com/kali_linux_hacking_tutorials_2020.pdf
    • http://lupibewexuzu.rf.gd/hspnet_information_sheet.pdf
    • https://s3.amazonaws.com/lebaxa/level_n_books_for_guided_reading.pdf
    • http://mivevusewez.epizy.com/rakotepox.pdf
    • https://uploads.strikinglycdn.com/files/c6437469-ff8a-4ec4-9d18-b4c746f003b1/79521607159.pdf
    • https://s3.amazonaws.com/bidivo/e_w_bullinger_gospel_in_the_stars.pdf
    • http://muvekalufisu.atwebpages.com/the_only_road_book.pdf
    • https://uploads.strikinglycdn.com/files/589b69a7-b32c-44d7-8b2e-4c5023b02de8/59757061181.pdf
    • https://s3.amazonaws.com/mevuzokekenojab/62319619654.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f10d.bin
a18f10e69f48b5930a86a25ce2a3f67149dd57cb3f27c70b7ca8355ff6aaea9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF10D 5080 bytes
font_01_sfnt_off00010248.bin
67f1e1cf4d57bbaf8b0f916dcafeec01336e70a89241273a82846d5d914862c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10248 10288 bytes

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