Malicious PDF — malware analysis report

Static analysis result for SHA-256 332f5b61b8305664…

MALICIOUS

PDF

77.9 KB Created: 2021-03-20 06:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed821f51714fd3ae4c9e2fffb81e77d8 SHA-1: 9da8b0998dbdf3b84c5a2065bb5a19022ced09d4 SHA-256: 332f5b61b8305664b96783c39e9a53a4dac03630ef9982b15abf580eefb195f8
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/award?keyword=amiodarone+infusion+protocol+pdf
    • https://cdn.sqhk.co/vefusujix/jjhczRv/93687169238.pdf
    • http://duribil.iblogger.org/pirilozerezisinos.pdf
    • https://cdn-cms.f-static.net/uploads/4383475/normal_6040ae98cd02a.pdf
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdf
    • https://cdn.sqhk.co/panafilaputu/hjjaigi/gold_boots_outfit.pdf
    • https://cdn.sqhk.co/gepabafi/piiRijN/fantasy_name_generator_skyrim_high_elf.pdf
    • https://cdn-cms.f-static.net/uploads/4479210/normal_604dae9ce68e7.pdf
    • https://galanopudaxu.weebly.com/uploads/1/3/4/1/134109153/c6b87bc6d4c77.pdf
    • https://cdn-cms.f-static.net/uploads/4494891/normal_60108fba71997.pdf
    • https://pevomoten.weebly.com/uploads/1/3/4/6/134626000/9f83aa0d2b.pdf
    • https://cdn-cms.f-static.net/uploads/4416136/normal_602dc7ac188ed.pdf
    • https://dukinuvofipul.weebly.com/uploads/1/3/2/7/132711936/2d9ce7.pdf
    • https://static.s123-cdn-static.com/uploads/4393751/normal_5ff224c6a65ef.pdf
    • https://tuwebuliwarukor.weebly.com/uploads/1/3/5/4/135400964/takato.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa363403-2efa-43da-ad5e-4d042a4c77fd/dujelijakaxozadi.pdf
    • https://s3.amazonaws.com/ximupuv/maduvi.pdf
    • https://s3.amazonaws.com/gupojakami/personajes_de_cazadores_de_sombras.pdf
    • https://s3.amazonaws.com/ronenitevodo/wuwodonukuleped.pdf
    • https://s3.amazonaws.com/medaliwifufugel/tazib.pdf
    • http://kosatalek.rf.gd/rusabosaresa.pdf
    • http://wenitomizejow.epizy.com/c_s_lewis_screwtape_letters_summary.pdf
    • http://bezopiwuzalobit.rf.gd/jotigenedegupebox.pdf
    • https://s3.amazonaws.com/resabomibogodaw/pubelunujanuwurobuladowo.pdf
    • https://uploads.strikinglycdn.com/files/85dda006-f8c2-4dd4-bb18-ab29c265aaef/xeparupulezosafib.pdf
    • https://uploads.strikinglycdn.com/files/9bf9e461-78db-4279-a1a5-2d41286e94b8/zakino.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_off0000f46d.bin
f325d87819289c41d0ef5762c0a59c6e5c275413aab062303bc8aa489a2706f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 5288 bytes
font_01_sfnt_off00010654.bin
a32d2533fdd668d53145a7b4c4a58c84273cb06fc3541fe9149af1517865908c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10654 10604 bytes

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