Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f2ec051ab69496…

MALICIOUS

PDF

38.9 KB Authoring application: Pdftk
MD5: 2146f2a0f2a7c178556c67e9ff368028 SHA-1: 95ada3d6bb55c947ec85c17a6b1454cc009b8003 SHA-256: a2f2ec051ab694965b7f5e2477f0b7d4809c120e23c8382104594dd760ae16b2
152 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains, indicating a link farm for SEO manipulation. The document body, though partially corrupted, mentions 'Physical therapy exercises for lower' and includes a URL that appears to be the primary lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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 http://nusdive.com/uploads/1/3/0/3/130324191/pititit.pdf
    • https://kumizadeti.weebly.com/uploads/1/3/0/4/130483428/3acb147e9472a5.pdf
    • http://rejoso.zoomroom63.ru/uploads/2020/01/28/sanagukomigotes.pdf
    • http://nwbookpro.com/uploads/1/3/0/6/130604433/faba47649.pdf
    • http://aimeekena.com/uploads/1/3/0/3/130312985/3839610.pdf
    • http://beyoutiful.ca/uploads/1/3/0/5/130551033/barelobe.pdf
    • https://warajozawuv.weebly.com/uploads/1/3/0/4/130478314/0933878f34.pdf
    • http://naturaloasissalon.com/uploads/1/3/0/2/130272438/sibulibim.pdf
    • http://astrologieparis.fr/uploads/1/3/0/3/130323342/130323342.html#physical+therapy+exercises+for+lower

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001151.bin
98ef205961de618cfb5376e12ca7ca84830ea573fbae64d8666a5776823fa463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1151 7960 bytes

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