Malicious PDF — malware analysis report

Static analysis result for SHA-256 20552c42920e1316…

MALICIOUS

PDF

55.3 KB Authoring application: Inkscape
MD5: c19be53b5c903c17ac5d4c2753de05ba SHA-1: 0eca3bdfc8e89eeaca7f94aec75232c639fd0bfa SHA-256: 20552c42920e1316f1190fdde2ada3946b1197e3dd6116491f9c50b18d338cca
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics, including ClamAV and a machine learning classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic specifically identified a large number of external links, with the primary domain being 'morganlwebster.com'. The document body contains obfuscated text and references to 'Acer predator helios 300 17 inch malaysia', which appears to be a lure, along with numerous embedded URLs that are likely part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://morganlwebster.com/uploads/1/3/0/6/130640219/sesutejupogesam_tevebi_zokowixep_kexekug.pdf
    • http://cafecancun.us/uploads/1/3/0/6/130621654/391085.pdf
    • http://ccmun.ca/uploads/1/3/0/5/130550736/nunitavibekiw.pdf
    • http://missinglinkbrewing.net/uploads/1/3/0/7/130739544/410c45c.pdf
    • http://naturesworks.net/uploads/1/3/0/2/130288720/pedavajikejiwi.pdf
    • http://bimowugeji.homecookingbook.com/uploads/2020/01/28/nebelewatowigesiru.pdf
    • http://chewoncakes.com/uploads/1/3/0/5/130588461/130588461.html#acer+predator+helios+300+17+inch+malaysia

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000074be.bin
f7ddc3c0b2c039f0ff73c443d0c0ee67e1d086fb3af572f18d1694c39c69923f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x74BE 13436 bytes
font_00_sfnt_off00001167.bin
0681a8d7363573d0a56309d2be4b640379b6bc5f4fd619dfb80a79f96823b57c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1167 8828 bytes
font_01_sfnt_off00005f9e.bin
395c0fef89781b4d802a25dc4f79bd7b37cf94988b152a8ec44dcc550c094b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 9808 bytes
font_03_sfnt_off00009dd5.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD5 2616 bytes

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