Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60a5e1d8630104d…

MALICIOUS

PDF

49.8 KB Authoring application: Smallpdf Desktop
MD5: 197af66be63f2fe1ca4dbada291eb02e SHA-1: 68993b4987d32e81b4b364b760fd2de0efea42dd SHA-256: d60a5e1d8630104ddcb36d005f19a8caf85e3fa1fb80889d8526239e3180c639
150 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO spam or to distribute further malicious content. The document body text, though partially corrupted, mentions 'Subject line for job inquiry email', suggesting a lure to entice users to click on the embedded links.

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://wildoncherrysalon.com/uploads/1/3/0/4/130477979/fagekani.pdf
    • http://notesinthemargin.co.uk/uploads/1/3/0/4/130483981/lunan_gokaxoro_zirafewerubis_bawokes.pdf
    • http://molecularsupplements.com/uploads/1/3/0/5/130540664/d8ac300591e6.pdf
    • http://myajtraining.com/uploads/1/3/0/3/130379331/toxawob.pdf
    • http://archeryshot.com/uploads/1/3/0/4/130476389/9263080.pdf
    • http://natronacountyclassifiedprofessionalsassociation.org/uploads/1/3/0/5/130588336/12a7a9fde7.pdf
    • http://kelownaliveedge.com/uploads/1/3/0/3/130323167/jefebutegikamiwos.pdf
    • http://bradvanambergrealestate.com/uploads/1/3/0/2/130289521/nogirogijupibad.pdf
    • http://mhdtechnologycorp.com/uploads/1/3/0/5/130540186/130540186.html#subject+line+for+job+inquiry+email

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000126f.bin
65778338a8b5c14fdef085ad178586b38d4688dac7a9b4aea84c6e2fe166b93f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126F 9364 bytes
font_01_sfnt_off0000723f.bin
75ad5726b260fca9c3b66ca94450239fbc156c1891091fcfcfab965e4b2051b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723F 16376 bytes
font_02_sfnt_off00008788.bin
689b541d7797ba3e5aa8a6884ea8cc23774d214e5fbea939a9c504b122fcc657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8788 2048 bytes

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