Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5f814a1b4bedb9…

MALICIOUS

PDF

38.8 KB Authoring application: GIMP
MD5: 2fcfe47c5b449a6dcdd8d35d04ce161f SHA-1: 185189276c918a446797f6aa34f26c9b426afc1a SHA-256: 2e5f814a1b4bedb9641c9dbeafbdaf707180cf82a261533aca6d3c5a9e6098f2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to other PDF files across various domains. This behavior is indicative of a link farm or a distribution mechanism for malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. The ML classifier also strongly flagged this file as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://summerfoxart.com/uploads/1/3/0/5/130539928/getepo.pdf
    • http://armidalemintodental.com/uploads/1/3/0/2/130289354/8664347.pdf
    • http://songofthelarkmusicforthesoul.com/uploads/1/3/0/6/130604519/6553172.pdf
    • http://bestself.studio/uploads/1/3/0/5/130590297/xajilovofobaser.pdf
    • http://sparkfaith.com/uploads/1/3/0/4/130483492/xujipubepino-wuruteditaxiki-lisanuxitefiro.pdf
    • http://segaxiz.hoex.ru/uploads/2020/01/29/239411.pdf
    • http://paulspadafora.net/uploads/1/3/0/7/130776253/fe49552.pdf
    • http://aziragroup.com/uploads/1/3/0/6/130621801/zesisi_tegubaxoludul.pdf
    • http://battagliaresearchgroup.org/uploads/1/3/0/6/130604902/vaxegufutoxa_dasun.pdf
    • http://cfthomas.com/uploads/1/3/0/5/130539448/130539448.html#psoas+abscess+pathophysiology

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000125d.bin
8eda3a453062a7cec3254bcfb3b3f38a8e0fcf8b1acba4b7198f49a620676ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125D 9232 bytes

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