Malicious PDF — malware analysis report

Static analysis result for SHA-256 231b2859e385c2a5…

MALICIOUS

PDF

40.5 KB Created: 2020-04-11 07:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2a4d595cca988a1008f68c37893c3e1e SHA-1: 6f7075f4a795c58eaf5fb8e9d73d3ba0a20f86b1 SHA-256: 231b2859e385c2a5545d6389fc590dad430e68eea681e27abdf94f1ef435fc76
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm, which is a common technique for redirecting users to malicious sites. The ClamAV detection 'Pdf.Dropper.Agent-9614309-0' and the ML classifier strongly indicate malicious intent. The document body, though partially corrupted, contains references to URLs that are also listed as IOCs, suggesting a lure to download or view content from these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.Dropper.Agent-9614309-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9614309-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://nashobavalleyextractco.com/uploads/1/3/1/4/131406207/131406207.html#hawayein+mp3+download+raagtune
    • http://anel.me/uploads/1/3/1/4/131453808/dakefod-naselugek.pdf
    • http://prettyelite.org/uploads/1/3/0/3/130323599/6613775.pdf
    • http://passionistsglasow.com/uploads/1/3/0/6/130639782/nexebijifofodilat.pdf
    • http://realestateromantics.com/uploads/1/3/0/6/130621418/032755af5db0.pdf
    • http://magicandgrumps.com/uploads/1/3/1/4/131455680/2839873.pdf
    • http://brandonkrachal.com/uploads/1/3/1/6/131606552/kakiwarajoxizav.pdf
    • http://unedenreepourgagner.com/uploads/1/3/0/5/130588928/bawalavuxit.pdf
    • http://milwaukeehandymanservices.com/uploads/1/3/0/2/130272339/jiruvok.pdf
    • http://fameusfame.com/uploads/1/3/0/5/130551832/wezixal-zemefoxaji-butevu-gabiguwasibagu.pdf
    • http://ubiomes.com/uploads/1/3/0/6/130621345/topupipamukez-vojimimuwewo.pdf
    • http://lappartementhairboudoir.com/uploads/1/3/0/8/130814591/4848021.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000626f.bin
904affd63c3c76ed9116a24a430219e5200528af9bdb2a0280c23604c471d11b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 9004 bytes
font_01_sfnt_off000084c6.bin
c6970d9f593d15e59d7da2d114993de99fb9a302dd2f96d77458196854884979		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C6 6528 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.