Malicious PDF — malware analysis report

Static analysis result for SHA-256 de763740913025a0…

MALICIOUS

PDF

53.1 KB Authoring application: pdf-parser
MD5: fd7c68adfff9d4a58d9abbe77072a650 SHA-1: 3bd09385a38e0d0b551c81085310da415a72b1dd SHA-256: de763740913025a0a4700eebff293bb6cff49f2148c73ae9a20d30ebb9f6ad86
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including a critical alert for a large number of external PDF links, indicating a link farm. The ML classifier and ClamAV also identified it as malicious, specifically as phishing-related. The embedded URLs are likely used to redirect users to malicious sites, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://www.fullreach.com.au/uploads/1/3/0/7/130775195/sararugad_vowoposedaj_kuxosotivatik.pdf
    • http://74-123-78-86.mgwnet.com/uploads/1/3/0/5/130589031/fijobutepefan.pdf
    • http://mail.tmdtc.org/uploads/1/3/0/7/130775990/pometotuzilaxug.pdf
    • http://hemcarsi.com/uploads/1/3/0/5/130590588/3084447.pdf
    • http://justasmallchapter.com/uploads/1/3/0/2/130289800/a933eb.pdf
    • http://jmhsurgery.org/uploads/1/3/0/6/130639901/3d0e404051d387.pdf
    • http://midwestmusclebullyclub.com/uploads/1/3/0/7/130776393/munanu.pdf
    • http://100places-locations.com/uploads/1/3/0/7/130775509/cadeab6c055b.pdf
    • http://siyaosiwangluoqipaiyouxi.br3h.com/uploads/1/3/0/7/130775817/4066159.pdf
    • http://www.dailyharvestmicrogreens.com/uploads/1/3/0/7/130739430/f9026423e.pdf
    • http://onlinefitnessunderground.com/uploads/1/3/0/6/130605383/zidev.pdf
    • http://mimiwong.net/uploads/1/3/0/2/130288542/kalekikenov.pdf
    • http://visitnewburystreet.com/uploads/1/3/0/3/130323748/350dd7969be.pdf
    • http://cbcor.org/uploads/1/3/0/3/130313585/6971107.pdf
    • http://rss-me.com/uploads/1/3/0/7/130776023/48a7076a.pdf
    • http://boneheaddog.com/uploads/1/3/0/5/130550986/bezexibejonax.pdf
    • http://vbya9.slpny.com/uploads/1/3/0/4/130483364/130483364.html#acidosis+metabolica+anion+gap+normal

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001223.bin
12efe18f37b204014afcf9b88c57e86f1b22f11e2482f6f6ae83e78f2a14cccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1223 8944 bytes

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