Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e89aa529af89ff…

MALICIOUS

PDF

37.2 KB Created: 2020-06-06 04:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e3dec74da1450accfe4cb0fa499dcfd SHA-1: c2f8f2d293e44e8aa74aae0c6392c3cf18648004 SHA-256: 39e89aa529af89ff14bcc8ba78d57d83bba19c73bcfc739102d0ec8c8337c3dc
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains a large number of external links, many pointing to domains that appear to be part of a link farm. The document body text, though partially corrupted, includes a lure related to "Scooby Doo" and a movie link, suggesting a deceptive SEO spam or content hosting purpose. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://renx-built.com/uploads/1/3/0/3/130379169/130379169.html#scooby+doo+%25C3%25A7izgi+filmi+izle
    • http://wiispoland.org/uploads/1/3/0/8/130813546/kolelaxoku_gulixe.pdf
    • http://lwsocal.com/uploads/1/3/0/2/130289154/tipusen-zevudu-luvubefitu-ligijoxi.pdf
    • http://livmeier.com/uploads/1/3/0/7/130738950/dobujirov.pdf
    • http://renx-built.com/uploads/1/3/0/3/130379169/terms.html
    • http://renx-built.com/uploads/1/3/0/3/130379169/dmca.html
    • http://renx-built.com/uploads/1/3/0/3/130379169/policy.html
    • https://surokukafat.files.wordpress.com/2020/06/niruvifaxif.pdf
    • https://wuwadapup.files.wordpress.com/2020/06/pavoxik.pdf
    • https://towuferenin.files.wordpress.com/2020/06/24601895871.pdf
    • https://fadadidigar.files.wordpress.com/2020/06/jumabenivagotewu.pdf
    • https://fiwikixuxun.files.wordpress.com/2020/06/24453776666.pdf
    • https://ridedude.files.wordpress.com/2020/06/63320103501.pdf
    • https://paxemeju.files.wordpress.com/2020/06/fexisikolasip.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a57.bin
310cf1d8fd6c6739c4d8b548b73a7d3d0a5b5a76231af9f67fde75c2d318bcc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A57 14812 bytes

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