Malicious PDF — malware analysis report

Static analysis result for SHA-256 13276648a9efe074…

MALICIOUS

PDF

58.3 KB Created: 2020-12-22 01:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d20f80b0a76f8cc9b705a515ef024b9 SHA-1: 384007f93fd19ad418c84ce56945a8aaf3aa352a SHA-256: 13276648a9efe07433f2e93393f28f351021783cc665123a59f623fc9244a714
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, with one pointing to a suspicious domain ('trafficel.ru') and others to S3 buckets and Weebly domains, suggesting a link farm or phishing attempt. The PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, likely intended to manipulate search engine results or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=a+street+cat%2527+s+tale+wiki
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/89f55.pdf
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/20806ee.pdf
    • https://static.s123-cdn-static.com/uploads/4370071/normal_5fc61d5448e41.pdf
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5f91c2f2b62b5.pdf
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/gekabemalifovozegiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gezetega/uc_browser_9._5_java_jar_app.pdf
    • https://s3.amazonaws.com/wokesabisevo/gisenutevenik.pdf
    • https://s3.amazonaws.com/baritexovopa/pixako.pdf
    • https://static1.squarespace.com/static/5fe12c38d17c8b74f75b9d7d/t/5fe131b482304d7322bb8f20/1608593844410/answer_back_system_pcx_tidak_bunyi.pdf
    • https://s3.amazonaws.com/forupokisip/kusumugubuzur.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/android_adb_command_launch_app.pdf
    • https://s3.amazonaws.com/rufonali/rozalumojigatarife.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccb3.bin
bedd0bb8a41e3482278d3f530d6043b58fb8e55fe09cd842da4ba87f0b95efee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB3 4972 bytes

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