Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb2d36b7f6c783d…

MALICIOUS

PDF

39.8 KB Authoring application: Nitro PDF
MD5: 1040d95342034811f042e5edb50ef497 SHA-1: d4fa8def5dd752b261fc382ebcc1b2aa956fdf4f SHA-256: bdb2d36b7f6c783d51f3fbbdb6131328642a8607889518b893926fe3dae75cb9
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which follow a pattern suggesting a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to the Chernobyl disaster, likely intended to mask the true purpose of redirecting users to potentially harmful websites.

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://focusantiglare.com/uploads/1/3/0/7/130739833/21ba6d74546a.pdf
    • http://onepointsixoneeight.net/uploads/1/3/0/5/130550777/subasa.pdf
    • http://icounselhope.com/uploads/1/3/0/2/130272070/wetumegegoso-segexugaw-pajovevulasuj-lasadukerumiz.pdf
    • http://niwawriters.net/uploads/1/3/0/5/130542953/wipirofu.pdf
    • http://agoffacademy.com/uploads/1/3/0/8/130873861/fd1e63e42f.pdf
    • http://joaozinhoautomoveis.com/uploads/1/3/0/7/130739991/zipog-gitejabujavujo-zivivenujat-garexute.pdf
    • http://ovbeyondtherainbow.org/uploads/1/3/0/4/130488382/8151214.pdf
    • http://allforonefoundation.org/uploads/1/3/0/7/130739261/5179185.pdf
    • http://alterationstotnes.com/uploads/1/3/0/2/130272355/8589458.pdf
    • http://professionallawncareandlandscapingservicesnm.online/uploads/1/3/0/7/130739951/pedubexufada.pdf
    • http://lendingbill.com/uploads/1/3/0/5/130551449/timafif.pdf
    • http://dylanwyke.com/uploads/1/3/0/6/130639849/130639849.html#cuales+fueron+las+causas+del+desastre+de+chernobyl

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043f5.bin
6c51527c1369c69aaa724d8336edc0e276e4a4602833a9e35fc0884203efa218		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43F5 8900 bytes

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