Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f91824f35286506…

MALICIOUS

PDF

73.3 KB Created: 2021-04-26 04:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5d96cd3d35960d6332c1787fafdfe07 SHA-1: ac1833f535b3a5f4eebe7b9709c48a1bf5acb96f SHA-256: 0f91824f35286506408636751a48450b55ff504df72eb1d4611c77e3161327d8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to printer setup, likely intended to redirect users to the malicious URL for further exploitation. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate 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://vilenefex.ru/strik?utm_term=how+to+connect+brother+printer+without+cd
    • http://groshyk.site/how_do_i_replace_apple_watch_bands55asy.pdf
    • https://cdn-cms.f-static.net/uploads/4380854/normal_605707fce176e.pdf
    • https://cdn-cms.f-static.net/uploads/4480891/normal_604723140e41a.pdf
    • https://cdn-cms.f-static.net/uploads/4387698/normal_6055b3bf10160.pdf
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5fd7498019df7.pdf
    • https://cdn.sqhk.co/xasurila/ZjgJihl/your_lie_in_april_opening_song.pdf
    • http://myluckybet.xyz/is_it_worth_buying_a_coffee_grinder8uot4.pdf
    • https://cdn.sqhk.co/javeduner/hcgeCif/luxagivakuxikabi.pdf
    • https://cdn.sqhk.co/savunowudob/kDmJ4Eu/themeforest_wordpress_one_page_template.pdf
    • http://nawumamarupojo.22web.org/how_to_display_data_from_database_in_html_python.pdf
    • https://static.s123-cdn-static.com/uploads/4419642/normal_5fff75e821d4c.pdf
    • https://cdn-cms.f-static.net/uploads/4465133/normal_5fe79b2e89209.pdf
    • http://pet-guru.shop/average_lyft_driver_salary_los_angelesf4o7d.pdf
    • https://static.s123-cdn-static.com/uploads/4366020/normal_5ff2941e4f8ec.pdf
    • https://cdn-cms.f-static.net/uploads/4475389/normal_6059499a888da.pdf
    • https://cdn-cms.f-static.net/uploads/4466173/normal_60209c72b8bd6.pdf
    • https://cdn-cms.f-static.net/uploads/4488335/normal_606094666a2f4.pdf
    • https://cdn-cms.f-static.net/uploads/4372682/normal_601f385cc3720.pdf
    • https://cdn-cms.f-static.net/uploads/4419654/normal_601bf9a510dba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pamirorewa.epizy.com/90264972228.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_off0000e256.bin
4ce38665b7562ee3971b1e1b2157acb399ed6853700dbb90cf5ab34050b9f5c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE256 4932 bytes
font_01_sfnt_off0000f320.bin
28cc910643ee31a2132e64d1db45ba324bd23c9cf972de2a93631b5799829671
pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 10784 bytes