Malicious PDF — malware analysis report

Static analysis result for SHA-256 459c40850bdb727d…

MALICIOUS

PDF

64.7 KB Authoring application: OpenOffice Draw
MD5: f69a89fd833519eaa68fa1039bf4b88e SHA-1: 5543f3d2ed4b2908c59e40c7defb62d2b2ff2293 SHA-256: 459c40850bdb727d8c470ac8c2200f6a00930ed8cb1f3fc7cbfe3b49d8909045
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning and phishing. The document body, though corrupted, appears to be a lure related to alcohol fermentation, aiming to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate 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://livraexpress.ch/uploads/1/3/0/4/130483926/xuvoxaxarosukod.pdf
    • http://chrislloydmusic.com/uploads/1/3/0/8/130814083/ad13727.pdf
    • http://microschoolontherise.com/uploads/1/3/0/5/130590738/kasivaxukinurepavan.pdf
    • http://lexingtonschoolofmusic.net/uploads/1/3/0/6/130603704/vujufakoxopageru.pdf
    • http://redandgreen.net/uploads/1/3/0/2/130287942/6356587010cdb0f.pdf
    • http://repindicator.com/uploads/1/3/0/4/130493143/rikofega.pdf
    • http://bamubuvip.alltoptoxx.ru/uploads/2020/01/28/4947729.pdf
    • https://lojesaliget.weebly.com/uploads/1/3/0/4/130483973/rimedetizuti-sokaxefelaso-jasimebuzep-badev.pdf
    • http://amadorah.com/uploads/1/3/0/5/130547689/8a4f5265.pdf
    • http://northumberlandday.net/uploads/1/3/0/5/130588307/gawum.pdf
    • http://mississippi-ted.com/uploads/1/3/0/3/130324063/pokoxu_jiwelu_gabukuj_xaluwokamole.pdf
    • http://nipmucprincipal.com/uploads/1/3/0/5/130551949/130551949.html#production+alcohol+fermentation+ppt

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000141f.bin
375aeb166cf3c3b653bd43d0039d125ed5f86f10a2532072c396459c72fa5381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141F 9648 bytes
font_01_sfnt_off0000b813.bin
5a9695438bb362a8b10d86f415c06da9d71f416851af8c6c9c762304ce3c8158		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB813 16088 bytes

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