Malicious PDF — malware analysis report

Static analysis result for SHA-256 825ec2680b87e2aa…

MALICIOUS

PDF

36.8 KB Authoring application: Karbon First seen: 2020-09-24
MD5: a334b6a4c9d87eba6292cbc63380df0d SHA-1: 87aeb6d4094a80afefc27b442daba47786bddc3a SHA-256: 825ec2680b87e2aa0e7c61514d033d664f81454f607c9eebdd7660703c714ffe
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified as a link farm, which is a common technique for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or redirecting users to malicious content. No scripts were extracted, but the sheer volume of external links suggests a high likelihood of leading users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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 http://dogmoda.club/uploads/2020/01/27/5cb0ec077c01235.pdf In PDF document text
    • http://dekidex.promo8.ru/uploads/2020/01/27/1313578.pdfIn PDF document text
    • https://ruvotojizojige.weebly.com/uploads/1/3/0/3/130323210/23aaac07c.pdfIn PDF document text
    • https://jupedisa.weebly.com/uploads/1/3/0/5/130541763/460457.pdfIn PDF document text
    • http://vekakevila.kuhni07msc.icu/uploads/2020/01/27/zigoxekirejomes.pdfIn PDF document text
    • http://remoxow.n26-acces-enligne.com/uploads/2020/01/29/9584049.pdfIn PDF document text
    • http://xaditidoz.kavkaz-car.ru/uploads/2020/01/27/pezujizujesoda.pdfIn PDF document text
    • http://jevolare.paypal-support-limitted.com/uploads/2020/01/27/4864186.pdfIn PDF document text
    • http://chefsaba.ru/uploads/2020/01/27/9caa236c0.pdfIn PDF document text
    • http://badasscoinrings.com/uploads/1/3/0/4/130488983/sozaku.pdfIn PDF document text
    • https://viveramomugob.weebly.com/uploads/1/3/0/5/130588270/ridulize.pdfIn PDF document text
    • http://bolsterrogers.com/uploads/1/3/0/4/130476821/130476821.html#calefont+splendid+master+10+litros+manualIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6 8924 bytes
SHA-256: 3877b12872109e87164c13ec6e9761fc8f1898483e91877ae1bd884b8b045121

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