Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b4c5cb3b9e72a6…

MALICIOUS

PDF

38.2 KB Authoring application: PDFBox
MD5: 029dca20666bc871208451224aa0ee9e SHA-1: 52d6174d36714e682939e3cddac4287510144715 SHA-256: 88b4c5cb3b9e72a6a68eee0cf3eb7b7589ca95666f666262227486fd43d714de
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs point to domains that appear to be part of a link farm, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yournaturallybrightpatiocovers.com/uploads/1/3/0/5/130589250/550cefb127.pdf
    • http://pghyogacollective.org/uploads/1/3/0/3/130323293/b26631d6a604.pdf
    • http://mywonderowl.com/uploads/1/3/0/4/130476940/2456471.pdf
    • http://roadcraft-ds.com/uploads/1/3/0/4/130435581/03c9aa98ff8.pdf
    • http://antiviruseprotectserviceonline.site/uploads/1/3/0/2/130271148/130271148.html#practical+application+of+meridian+style+acupuncture

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001096.bin
670bcad3a1195a28007a8d05a27d4c2e39352a0e6913281e38fa8a3203c5d8d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096 8432 bytes

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