Malicious PDF — malware analysis report

Static analysis result for SHA-256 3394b90d6801d823…

MALICIOUS

PDF

76.7 KB Created: 2021-03-26 09:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3034ef79725cad57e9a5cda2715a1044 SHA-1: bedccd41ef34055346a029e865667db20decded7 SHA-256: 3394b90d6801d823907a38db49a6c8f93a1aae0327676409d163d34568d715b2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/123?utm_term=chennai+express+songs++mp4+telugu
    • https://cdn.sqhk.co/suwefememe/jTgh66t/11444868873.pdf
    • https://cdn.sqhk.co/zaviresodew/Pwghzjg/bamafofoberefozowalu.pdf
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/e7d87db14fb.pdf
    • https://static.s123-cdn-static.com/uploads/4378623/normal_6002ef1734f8e.pdf
    • http://kodepovorivapi.mygamesonline.org/bibliography_examples_for_students.pdf
    • https://cdn-cms.f-static.net/uploads/4412380/normal_60377e926129e.pdf
    • https://wurumoziwozosib.weebly.com/uploads/1/3/4/6/134644160/97069083.pdf
    • https://static.s123-cdn-static.com/uploads/4367308/normal_5fe1949c967ad.pdf
    • http://zonizubiro.getenjoyment.net/votamalosu.pdf
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/6008440.pdf
    • https://lizameguxif.weebly.com/uploads/1/3/1/6/131606128/9010735.pdf
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/3278c69b82a2e.pdf
    • https://cdn-cms.f-static.net/uploads/4486054/normal_60321c3de90b9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gonafoziguwewe/bamboo_fiber_sheets_bed_bath_and_beyond.pdf
    • https://s3.amazonaws.com/tuxexi/22730968731.pdf
    • https://s3.amazonaws.com/mavixu/wimulizetejowazazorul.pdf
    • http://gujimosodaza.myartsonline.com/sasanaxinedoziwezov.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_off0000ee9d.bin
3f463da2a2a530b9fd88cf109878a9d368fa03b31f6ccccc929e70919b9b1bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 5292 bytes
font_01_sfnt_off00010079.bin
4146f3698d93c894571f3e11317940c9b1a334c219687e3b774948d74c86d82d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10079 10300 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.