Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1d96a5b8587a09…

MALICIOUS

PDF

39.7 KB Authoring application: OpenOffice Draw
MD5: c8bb2e2057d2d2f940c00156a51e62c2 SHA-1: 403bf7b01338a12532fbb8a32893da7f0f38f24a SHA-256: 1a1d96a5b8587a09d153248884de9308c76187de8937ff7836dd563348fb7a28
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm containing numerous external PDF links. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a phishing or traffic-driving campaign, where users are likely lured to download further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://cuestionentrerriana.com/uploads/1/3/0/3/130323767/9110901.pdf
    • http://taxperks.net/uploads/1/3/0/4/130477882/jazabijelil.pdf
    • http://aztecwhistles.com/uploads/1/3/0/6/130604590/vexogovufa_talagiwe_linoso.pdf
    • http://digital-chicago.org/uploads/1/3/0/6/130621490/lojalexufujusa.pdf
    • http://nisi.top-indoor.ru/uploads/2020/01/29/futajo.pdf
    • http://downforacure.org/uploads/1/3/0/6/130639963/3e8bb4253c5.pdf
    • http://michelleislivingwell.com/uploads/1/3/0/5/130544078/kimaxikunatetopekir.pdf
    • http://kenboyerphotography.com/uploads/1/3/0/4/130488229/biril.pdf
    • https://nasasexevaw.weebly.com/uploads/1/3/0/2/130289748/7977669.pdf
    • http://bridesmaiddressesnewhampshire.com/uploads/1/3/0/2/130289652/xotobalunimom-dufotewawuga-pejigotamofi-rujojuzatuni.pdf
    • http://northernsound.com/uploads/1/3/0/5/130551087/78dfef477df1d.pdf
    • http://norbertfodor.com/uploads/1/3/0/6/130604654/nemapekilagokukaxul.pdf
    • http://mrmacbiblebook2.com/uploads/1/3/0/5/130538939/130538939.html#ielts+practice+test+6+listening+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013a6.bin
d94991099969a120747ac2483aa7f072824c4be75d7e36d6b2d72a30549e5b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6 8388 bytes

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