Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b26e1583064598c…

MALICIOUS

PDF

78.2 KB Created: 2021-05-06 02:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbe3608539619a13b3a224d18bb83919 SHA-1: 52ae3e89ce476b55f8220f05eecc2a190e3acb8e SHA-256: 2b26e1583064598cca0a1a1d991656c1c600bb38388d756ba6cb6959b1964867
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URI pointing to 'fokemale.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=is+ccna+still+relevant+2021
    • http://zhk-samolet-krasnodar.info/482873508310mhr2.pdf
    • https://cdn-cms.f-static.net/uploads/4423145/normal_6069239f48a0f.pdf
    • http://esplus.pro/how_to_write_molecular_orbital_electronic_configurationj41kb.pdf
    • https://cdn-cms.f-static.net/uploads/4377908/normal_605d6ec5a8d79.pdf
    • http://hookup757.fun/wojesirusxcx.pdf
    • http://bnl-jobs.com/gozofebuwamapo5eqkt.pdf
    • http://molotkov.site/vidijoderigigupujuguxewfob50.pdf
    • https://cdn-cms.f-static.net/uploads/4475725/normal_602df7c970134.pdf
    • http://sodaapp.club/30005906310xxaum.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://my-favshop.online/vedegipakagurasp8ez.pdf
    • https://static.s123-cdn-static.com/uploads/4385421/normal_6007a6fe5ee51.pdf
    • http://xotizel.iblogger.org/charles_dickens_a_tale_of_two_cities_free_download.pdf
    • http://eyebrowthreadingdallastx.com/learn_c_language_in_hindi_for_beginners6e6od.pdf
    • http://begetus11ppz.xyz/66761973214s2f9z.pdf
    • http://oyuncuxx.com/modern_interpretation_of_a_midsummer_nights_dreamy5nmu.pdf
    • http://legko.travel/palm_tree_cad_block_free93ytf.pdf
    • https://cdn-cms.f-static.net/uploads/4386365/normal_604cfd26c8124.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fc558bcd-0705-4a06-83dc-8c66d965b88f/lenofevuretofawinadoru.pdf
    • http://sapidobilebag.epizy.com/buzenarufidejese.pdf
    • https://uploads.strikinglycdn.com/files/900320ff-2d5a-47b6-be10-3bd598d1cb8b/dekejigo.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_off0000f338.bin
5d3f87f6b3ed107b2268e890756e542318684b74db7c3e76320d251d883a40f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 5116 bytes
font_01_sfnt_off000104b8.bin
5406c9690e3ae8f6b03e4453188c66deea64acc2fe9dae98b5c984419aae5b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x104B8 11484 bytes