Malicious PDF — malware analysis report

Static analysis result for SHA-256 855a99b2cbe7e7c9…

MALICIOUS

PDF

45.3 KB Authoring application: SWFTools
MD5: c288a4697e02ef67b63513bcece809b4 SHA-1: 466ddaae68a518d1ab118d4d47306c380cd59926 SHA-256: 855a99b2cbe7e7c929f98c5fe97429f107b65c819de6d82eb3f1ed876dc5f12d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially corrupted, contains text related to calligraphy and also lists numerous URLs, reinforcing the link-farming heuristic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 https://gazijeligapemob.weebly.com/uploads/1/3/0/5/130542991/fobikelusibotu-rofete-dozujeb.pdf
    • http://myspiritlevel.co.uk/uploads/1/3/0/6/130604984/poxowaki.pdf
    • http://rp-360.com/uploads/1/3/0/6/130640061/1437907.pdf
    • http://andrewtdemeo.com/uploads/1/3/0/2/130288448/7d20da3922b2f.pdf
    • http://michkah.com/uploads/1/3/0/6/130604044/1b3cb.pdf
    • http://sanfrancisco-interactivehypnotherapy.com/uploads/1/3/0/3/130313836/futubaxa-tubezepa-munigoterudaxi.pdf
    • http://mpnetwork.com.au/uploads/1/3/0/6/130621382/lowise.pdf
    • http://northwestfineartstudio.com/uploads/1/3/0/3/130313567/wojojon.pdf
    • http://prettylittlewaistline.com/uploads/1/3/0/6/130639867/2378ac075df4.pdf
    • http://solargenius.com.au/uploads/1/3/0/5/130589115/dozekimowufilawezoxa.pdf
    • https://vigudojifezisi.weebly.com/uploads/1/3/0/5/130589373/3080102.pdf
    • http://noscopegaming.net/uploads/1/3/0/4/130488169/130488169.html#modern+calligraphy+alphabets+for+beginners

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001331.bin
35b96088421d8022f9d82f5b8438b4505535220fe6777af5af597cdc87198741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1331 8724 bytes

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