Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccd75f59af9db5b…

MALICIOUS

PDF

73.1 KB Created: 2021-05-09 00:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68494aa63f72bbff8c31682471953f05 SHA-1: d6020349d8ebfa65af68f2026a4fe08c9c517ba2 SHA-256: 9ccd75f59af9db5bf7f4e48412b9797120970947f65ddc55df893a42564d91bd
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to pellet stove issues, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it functions as a malicious document, potentially leveraging PDF vulnerabilities or embedded JavaScript to redirect users.

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://pelibifir.ru/strik?utm_term=why+pellet+stove+won%2527t+light
    • http://bumisemi.iblogger.org/batch_file_programming_tutorial.pdf
    • https://cdn-cms.f-static.net/uploads/4450502/normal_60552244d8e87.pdf
    • https://cdn-cms.f-static.net/uploads/4421058/normal_6020b5e2b433c.pdf
    • https://cdn-cms.f-static.net/uploads/4424951/normal_5fe880f57e48d.pdf
    • http://vazewuxu.mywebcommunity.org/60471331963.pdf
    • https://cdn-cms.f-static.net/uploads/4386079/normal_600ab53987a1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/358999fd-66a3-4f34-9bad-880fcb2e7ed2/what_is_the_moral_of_the_lion_and_the_mouse_fable.pdf
    • https://uploads.strikinglycdn.com/files/765fdc68-852f-4553-b265-61c7036640e3/basic_linux_commands.pdf
    • http://lefabafe.epizy.com/hallelujah_chorus.pdf
    • https://uploads.strikinglycdn.com/files/8b919d6e-ed7b-4c7c-bdac-e92d8e4dd1c0/gikejobutufofugoxasizarog.pdf
    • http://visugog.myartsonline.com/61035399182.pdf
    • http://pozidijapepore.atwebpages.com/kujosujuwasimukalabamif.pdf
    • http://binuwuzipu.myartsonline.com/97293924902.pdf
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_daa07f3065b64e69a8c48682358add97.pdf?index=true
    • http://nukilaba.myartsonline.com/apush_period_4_review_quiz.pdf
    • http://vegexiwijije.rf.gd/uv_spectroscopy_application.pdf
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_227f4cb8680a4f49a460506fe7336701.pdf?index=true
    • https://4c8cc264-4606-483b-a6fd-3ab48ba5c15a.filesusr.com/ugd/c626f4_5946dd6aee1c45e1a9a49340844b62e7.pdf?index=true
    • 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_off0000e155.bin
ca252c8b276b646cb03f7dddffc1eb8368602eac7c67ac9a9a1fd4f6b1b80a2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 5076 bytes
font_01_sfnt_off0000f2cd.bin
064fe6a1231febed1e5eac69a0f16cfa6c50dc7d26d0ae74fa5fbe3a856d9623
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CD 10752 bytes