Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfba1cacbce1bd5d…

MALICIOUS

PDF

37.8 KB Authoring application: Smallpdf Desktop
MD5: adc538cee096c310ca250307e8fd0b91 SHA-1: 42fa75f80766e2f4fed79f959641207c1f0beaae SHA-256: cfba1cacbce1bd5d6d4a9eb038985f6fd83ae410996c2ae6f433f75601e0c096
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and an ML classifier returned a high malicious score. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with the primary one being http://swilliamsphotos.com/uploads/1/3/0/4/130483866/xizelirobunabu.pdf. This suggests the document's primary purpose is to lure users into clicking these links, likely leading to phishing or malware download sites.

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://swilliamsphotos.com/uploads/1/3/0/4/130483866/xizelirobunabu.pdf
    • http://paulbutlerusa.com/uploads/1/3/0/6/130639348/200222.pdf
    • http://interdependence.info/uploads/1/3/0/4/130436426/4064250.pdf
    • http://deadpointfilm.com/uploads/1/3/0/2/130272362/lerifebevof.pdf
    • https://nivobigud.weebly.com/uploads/1/3/0/5/130544448/gazavutitum-fefom-batidebiloxugan.pdf
    • http://rightjoin.com/uploads/1/3/0/2/130291769/jewuguxezadig_nuxakizoxe_xopibupikodezeg.pdf
    • https://kopixopewe.weebly.com/uploads/1/3/0/5/130590029/1f3ba9584b.pdf
    • http://nifitibide.rybalovnyesnasti.info/uploads/2020/01/28/4378790.pdf
    • http://allamericanoverheaddoors.com/uploads/1/3/0/2/130289734/3365357.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/6/130604620/130604620.html#lfs+6r+unlocker+chomikuj

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ac.bin
feba67c9ad08db341ef9b87b47015f625368a08302b50edcddf05705a475bd49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC 9020 bytes

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