Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adbf60eddd33282…

MALICIOUS

PDF

66.6 KB Created: 2020-11-24 16:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82f5f6101fca45ac80d58cc6f235fd41 SHA-1: 1c0ad519d9f29ffc89a3708fcdbf5d3f2ff6a3e3 SHA-256: 5adbf60eddd33282bafd4afb0ac471e7d3eb20e6e853a8065ec818249f08a17f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The embedded URLs and the PDF structure point towards an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=brebeuf+baseball+schedule
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/fopopapav.pdf
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/5061547.pdf
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/baroxumurevivu.pdf
    • https://xaniwunedevivat.weebly.com/uploads/1/3/4/4/134470123/97319.pdf
    • https://tozupetap.weebly.com/uploads/1/3/1/3/131383790/5070689.pdf
    • https://xakezoram.weebly.com/uploads/1/3/4/4/134497816/bilufetajitomiguba.pdf
    • https://lojizeli.weebly.com/uploads/1/3/3/9/133997115/vovexom.pdf
    • https://cdn-cms.f-static.net/uploads/4483365/normal_5fac07760c332.pdf
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/naxojuf_nodedugovu_tebebosefir.pdf
    • https://cdn-cms.f-static.net/uploads/4410194/normal_5f9ebeb8b9200.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizedumi/theories_of_deviance.pdf
    • https://s3.amazonaws.com/jeduzizonox/iron_man_coloring_sheets.pdf
    • https://s3.amazonaws.com/fadedosi/sepufolirij.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_off0000ca24.bin
72fe475aff4836177d3cd79eed5fed2103dc259f8aaab7579207a3b89292c811		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA24 5296 bytes
font_01_sfnt_off0000dc18.bin
24bf55e15a8ed47f08bd879768b2a7864ac49b86eb7567f645fff4851c3319bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC18 9740 bytes

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