Malicious PDF — malware analysis report

Static analysis result for SHA-256 62479f32a9c2c966…

MALICIOUS

PDF

74.4 KB Created: 2021-06-10 11:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51d80f13356f7b19d94de9b1c99973b1 SHA-1: e4ecb7fb0559492b59d3e1367ba9d66459477e6d SHA-256: 62479f32a9c2c966e29fa0151ec248958c81f28068c1e9cad1d909bd47bb4d52
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The embedded URL and document body suggest a lure related to game downloads, likely to trick users into downloading further malware. No scripts were extracted, but the PDF structure itself contains malicious elements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cructi.ru/pbw?utm_term=all+pokemon+games+gba+rom+download
    • https://cdn-cms.f-static.net/uploads/4459636/normal_605d95ddb6e7d.pdf
    • https://cdn-cms.f-static.net/uploads/4493545/normal_605ef62a91e0e.pdf
    • https://cdn-cms.f-static.net/uploads/4458849/normal_604876810c9f4.pdf
    • https://cdn-cms.f-static.net/uploads/4447497/normal_601af11bbf6f4.pdf
    • https://static.s123-cdn-static.com/uploads/4469378/normal_5ffe95aaafc5a.pdf
    • https://cdn-cms.f-static.net/uploads/4463785/normal_600a7464b3fb0.pdf
    • https://cdn-cms.f-static.net/uploads/4413013/normal_600da2de3e021.pdf
    • https://cdn-cms.f-static.net/uploads/4443812/normal_6037cc71c3cb7.pdf
    • https://static.s123-cdn-static.com/uploads/4380210/normal_5ff3cf3aab35a.pdf
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5fd2825c04dae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jesababa.pbworks.com/w/file/fetch/144425370/does_total_fitness_do_nhs_discount.pdf
    • http://fetinaduv.pbworks.com/w/file/fetch/145011684/paxen.pdf
    • http://zatesil.pbworks.com/w/file/fetch/144994830/maths_word_problems_for_grade_4_addition_and_subtraction_with_answers.pdf
    • http://torefobomuzu.pbworks.com/w/file/fetch/144772188/apa_arti_laa_ilaha_illa_anta_subhanaka_inni_kuntu_minadzolimin.pdf
    • http://tosuvop.pbworks.com/w/file/fetch/144451305/dagefijixi.pdf
    • http://lekuzax.pbworks.com/w/file/fetch/144679791/tiwepujosigunizefomim.pdf
    • http://xojifot.pbworks.com/w/file/fetch/144413610/periodic_table_of_elements_symbols_and_names_quiz.pdf
    • http://nalujoxerisi.pbworks.com/w/file/fetch/144662418/tamivulepedukobafene.pdf
    • http://ludagobef.pbworks.com/w/file/fetch/144554175/setting_tp_link_tl-wa901nd_sebagai_repeater.pdf
    • http://mojuseraneno.pbworks.com/w/file/fetch/145019523/nidubivebav.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_off0000e3a7.bin
7da72213a0072d44dfb4d7488f85129977ad9b3765920fd14efd95abac25c06d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A7 5564 bytes
font_01_sfnt_off0000f685.bin
0fe468865a3ce19101617dca03b91cb8150b18829fa03df32c8b468df5c295d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF685 11084 bytes