Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d83d421a64d049…

MALICIOUS

PDF

33.2 KB Authoring application: Pdftk
MD5: ed1b0b9f228bf69aaf0a4975dc41bb0c SHA-1: 8dfeb065c326370b62c31c7eee2ed8c76a353c01 SHA-256: 49d83d421a64d0490f64fb76905bada4b357e1fa7937fa76ba58e96da70ddf37
152 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 common technique for SEO poisoning and phishing lures. The document body, though partially corrupted, contains text related to perishable foods, likely a pretext to encourage clicks on the embedded malicious URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing and traffic redirection.

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://roku.oneshop1.fun/uploads/2020/01/28/bugokogopokebadog.pdf
    • http://lopila.audiostart18.icu/uploads/2020/01/28/watixevuvobav_mabenolipelasom.pdf
    • http://rabosu.sultantec.com/uploads/2020/01/28/8703421.pdf
    • http://vekeb.imperium.bz/uploads/2020/01/28/3a2fd2e.pdf
    • http://dicasprevidencia.com/uploads/1/3/0/3/130323271/tirezobivugibipamu.pdf
    • http://ohota.ru/uploads/2020/01/28/midamunen.pdf
    • http://shopbelfast.info/uploads/1/3/0/5/130588380/130588380.html#que+son+los+alimentos+perecederos+y

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010b6.bin
b8201cad8f63f4383a1d791aea9fd81f18236ec288ae5ce8b7ee57135185dc2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6 8376 bytes

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