Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b74f7c2789b408a…

MALICIOUS

PDF

79.8 KB Created: 2021-04-01 17:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68cdfd84542236a0cac6210468efab90 SHA-1: 5537ef34c75697229087e659e2398251b7be1789 SHA-256: 2b74f7c2789b408a491c433ce07fb3b14eda3c4b450371ea2918b0e344d17d0c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/aws?utm_term=timex+indiglo+leather+strap
    • https://cdn-cms.f-static.net/uploads/4387035/normal_6037328683843.pdf
    • http://zogasukod.22web.org/cg_comedy_dhol_dhol.pdf
    • http://gebajajax.22web.org/rojufekuwa.pdf
    • https://static.s123-cdn-static.com/uploads/4472495/normal_5fe0ffc3727c5.pdf
    • http://neo-tp.ru/numeros_complejos_operaciones5foza.pdf
    • https://cdn-cms.f-static.net/uploads/4378157/normal_6010dc4f52a10.pdf
    • https://lotekovikerux.weebly.com/uploads/1/3/1/3/131398560/2915476.pdf
    • https://cdn-cms.f-static.net/uploads/4472484/normal_6038bb0224e42.pdf
    • http://lebedugipul.mywebcommunity.org/can_you_replace_a_fire_tv_remote.pdf
    • http://clipshd.design/29378751328ucbb6.pdf
    • http://vojemodipu.sportsontheweb.net/kupumapotaxisesofob.pdf
    • http://copyrighthelpptteam.com/monster_truck_movie_cast_namem3qg5.pdf
    • https://naxovemunozi.weebly.com/uploads/1/3/5/9/135958864/rigulideluku_papadujazupepam_rudarudo.pdf
    • http://nosilekexiwot.mywebcommunity.org/how_to_fix_ice_dispenser_on_frigidaire_refrigerator.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sirilagewuga/dukekejebugewabeb.pdf
    • http://narimuwoxabu.epizy.com/livre_d_alphabtisation_pour_adultes.pdf
    • http://divupovive.epizy.com/soft_skill_vs_technical_skills.pdf
    • http://dolojivek.onlinewebshop.net/behringer_xr12_manual.pdf
    • https://s3.amazonaws.com/podawakumepewez/94652180651.pdf
    • http://lepomosafajuki.rf.gd/5468001351.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_off0000f7bf.bin
3039e185e18cbe526dee38dc5c19d4d42488d96414f66a9cbb534415aaca9f5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 5392 bytes
font_01_sfnt_off000109ec.bin
16e36fe12db2470796d6b7ed7f13cf9ca608ec65e7942c6f4271ebdb9153e431
pdf-font-stream PDF embedded font (sfnt) at offset 0x109EC 11932 bytes