Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6d9d405cb6993b…

MALICIOUS

PDF

92.2 KB Created: 2021-04-08 08:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d2d73200d1b8ec83ead5e5728c72907 SHA-1: bdf9637fc52f4d3eb4dbd28157f822bd4a18581e SHA-256: 8f6d9d405cb6993bffcd036f050dcc922bd0774e1ec3c3720d9ba2b2c8f5e1c6
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of the external URI and the high confidence scores suggest this PDF is designed to redirect users to malicious content.

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://pelibifir.ru/strik?utm_term=nyc+mta+bus+schedule+staten+island
    • https://cdn-cms.f-static.net/uploads/4402964/normal_603b1f333acd2.pdf
    • https://cdn-cms.f-static.net/uploads/4420917/normal_603d8c149d472.pdf
    • https://cdn-cms.f-static.net/uploads/4495390/normal_5fd6d12cd9a4c.pdf
    • https://cdn-cms.f-static.net/uploads/4410965/normal_6058d3a9a2d82.pdf
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5ffcc761b3797.pdf
    • https://cdn.sqhk.co/vasozaponem/ijeoifp/21742239107.pdf
    • http://gunofixe.medianewsonline.com/chapter_5_absolute_monarchs_in_europe.pdf
    • http://tefitagesev.mypressonline.com/netgear_nighthawk_ac2100_vs_ac2600.pdf
    • http://dotenipago.medianewsonline.com/61505625637.pdf
    • https://cdn.sqhk.co/tixunudixa/jfhg61p/pixel_maker_pro.pdf
    • https://www.easypaymetrocard.c
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tozaduliwubega/organization_flow_chart_template_free.pdf
    • https://uploads.strikinglycdn.com/files/d61e0311-5753-42c6-ab0d-9d64d83964d9/how_do_i_desire_god_more.pdf
    • https://s3.amazonaws.com/sobaketemu/kask_mojito_road_helmet_size_guide.pdf
    • https://uploads.strikinglycdn.com/files/4032bab7-4ca2-4775-b364-9519cc472507/mowasinokewizawusofuzu.pdf
    • https://s3.amazonaws.com/sitozi/31055266219.pdf
    • https://uploads.strikinglycdn.com/files/43bafb97-2a10-4724-977d-c88ea30103f7/luluf.pdf
    • https://s3.amazonaws.com/lekezaru/app_inventor_2_emulator.pdf
    • http://mta-nyc.custhelp.com/cgi-bin/mta_nyc.cfg/php/enduser/ask.php
    • 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_off00010fc5.bin
f9839ee6fb3fd7c71adf47d5df07c749fb4033de958d7bfab4edb07da4b47047
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC5 5292 bytes
font_01_sfnt_off000121a8.bin
39e988d6764d40678ada6062d3fb7859a84d9db18cb0c74f2829e0fab2c45f04
pdf-font-stream PDF embedded font (sfnt) at offset 0x121A8 23988 bytes