Malicious PDF — malware analysis report

Static analysis result for SHA-256 017067cb8c8c7beb…

MALICIOUS

PDF

82.3 KB Created: 2020-04-04 10:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 03e6b68f0470bd1dd79f73aeecf7890b SHA-1: af14a821170db6b04d084db2b521d8cbb8f12d4d SHA-256: 017067cb8c8c7bebb42c470daaa02d870e9dca5f036ceb26216612ebf49c448d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO poisoning or redirecting users to malicious sites. The ClamAV detection as 'Pdf.Dropper.Agent-8900760-0' and the ML classifier's high confidence score indicate malicious intent. The embedded URL 'http://scrapsvolunteer.org/uploads/1/3/0/6/130620633/130620633.html#adams+xtd+driver+adjustments' is likely part of this redirection chain.

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-8900760-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8900760-0
  • 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://scrapsvolunteer.org/uploads/1/3/0/6/130620633/130620633.html#adams+xtd+driver+adjustments
    • http://mundarebakery.com/uploads/1/3/0/5/130589354/80229.pdf
    • http://chipkeyes.com/uploads/1/3/0/7/130739112/8088316.pdf
    • http://serenitycosmetcidental.com/uploads/1/3/0/7/130776874/3996968.pdf
    • http://tressels.net/uploads/1/3/0/5/130544672/gosup.pdf
    • http://achyjointscreations.com/uploads/1/3/1/1/131164431/5fbce.pdf
    • http://organiclifedayspa.com/uploads/1/3/0/9/130969075/9667746.pdf
    • http://richrayburnroofing.com.richrayburnroofing.com/uploads/1/3/1/4/131437037/6481916.pdf
    • http://arnfredpsykologer.dk/uploads/1/3/0/5/130542729/9982398.pdf
    • http://beyondthewildernessgifts.com/uploads/1/3/0/3/130324063/danetiz.pdf
    • http://argylebunnyclothing.ca/uploads/1/3/0/3/130323532/29e17e436dbb.pdf
    • http://yogalabbet.se/uploads/1/3/0/5/130541186/be43c55886.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104ee.bin
bfdaa52e85321936e99bb4e2377383868c2b61c185de901abe5ce8c8fde32a88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104EE 8656 bytes
font_01_sfnt_off0001261c.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 16204 bytes

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