Malicious PDF — malware analysis report

Static analysis result for SHA-256 0474285173980beb…

MALICIOUS

PDF

44.5 KB Authoring application: pdf-parser
MD5: a93ea1df26879516550cbd2efd97ef81 SHA-1: 126d31cb1f669d1a0798c99bff8e572845b20d14 SHA-256: 0474285173980beb0cc44a146784d783902f8f40137ccedfadfa61090beb7a5e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. This suggests the document's primary purpose is to direct users to a network of other PDF files hosted on various domains. The ClamAV detection and ML classifier further support its malicious nature, likely related to phishing or SEO abuse.

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://interdependence.info/uploads/1/3/0/4/130483667/kizunoxofagarev_nalavabul.pdf
    • http://sjsbeacon.com/uploads/1/3/0/2/130289340/wubiramozobodiletaw.pdf
    • http://bettysmusic.com/uploads/1/3/0/3/130323109/1877435.pdf
    • http://xn--sptjeneste-25a.com/uploads/1/3/0/5/130550684/bexutelelopudeziteni.pdf
    • http://pirateinwonderland.com/uploads/1/3/0/6/130640119/e3f28a.pdf
    • http://minchatholdings.com/uploads/1/3/0/2/130287895/310573.pdf
    • http://narchacker.com/uploads/1/3/0/6/130621022/renesosu_vugadutalu_fiwijagenepuwef.pdf
    • http://bindiyaaravandekar.com/uploads/1/3/0/6/130604401/tolajitoxax_sozevobavabu.pdf
    • http://rebeccalaplacaattia.com/uploads/1/3/0/3/130379711/130379711.html#ikea+uk+mattress+cover

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001228.bin
e543f5a47d16ec6120f267613bf90cc532a016f75bd9f08d983eaab744dbb7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1228 9324 bytes

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