Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7930a0db1a51e09…

MALICIOUS

PDF

80.2 KB Created: 2021-04-04 16:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12fc98615a80ec7b542d00a57b57f72a SHA-1: 295a7826e8e2c142051fc55f394dfe8d5421706e SHA-256: a7930a0db1a51e09d022b88acaf1adf5b4dae48542bf570cf7c7c3ceedae718f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The embedded URLs suggest a phishing or scam attempt, likely aiming to direct users to malicious content disguised as a PDF. No scripts were extracted, but the PDF structure itself contains links to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://ponafet.ru/award?keyword=bypass+gastrico+y+diabetes+pdf
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/jenamawobi.pdf
    • https://cdn-cms.f-static.net/uploads/4448549/normal_60461eb45a4e9.pdf
    • http://pupunorip.getenjoyment.net/jesegizumijelageloxebo.pdf
    • https://cdn.sqhk.co/fusaduxuw/Vhh7Ghb/4438363935.pdf
    • https://static.s123-cdn-static.com/uploads/4482190/normal_5ff895feb9081.pdf
    • https://cdn-cms.f-static.net/uploads/4464330/normal_605b267cd8dd7.pdf
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/6187846.pdf
    • http://zimezobot.getenjoyment.net/kowovekaz.pdf
    • https://cdn.sqhk.co/vovomafejuwa/cyc9Dhe/15819315196.pdf
    • https://cdn.sqhk.co/xurajalijok/illOphi/outfitters_kodiak_island_brown_bear_hunts.pdf
    • https://xorizetevapaze.weebly.com/uploads/1/3/1/4/131438163/816b0.pdf
    • https://cdn-cms.f-static.net/uploads/4367645/normal_606293abee153.pdf
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/21c9ebf.pdf
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5fd6e23791dba.pdf
    • http://janafan.scienceontheweb.net/icd_10_alphabetical_index_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4383149/normal_5fe143764bebd.pdf
    • http://sixesijilolun.mywebcommunity.org/authors_purpose_worksheet_4_answer_key.pdf
    • https://nupuwuzom.weebly.com/uploads/1/3/1/4/131438231/3916404.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sefowolo.atwebpages.com/48515237960.pdf
    • http://judiserod.onlinewebshop.net/die_bosniaken_kommen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eedc.bin
ce5063f6e4059d98ba881dbf3a768db3b7a8f39ecba6329aa31561553ba2ce54
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 5264 bytes
font_01_sfnt_off000100d4.bin
8164c5ab67e8e8c453f5be8b46664a5d56ab28ac8dd3af9f025160a844965399
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D4 10836 bytes
font_02_sfnt_off00012551.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x12551 4324 bytes