Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c3f917f86bad9d…

MALICIOUS

PDF

34.1 KB Created: 2020-06-02 18:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac14725bb02b112005a75f7541e18668 SHA-1: 6299bac99c14f675aa9a5b50ff425df7a54cd6ee SHA-256: 08c3f917f86bad9dfeb1ab339dc3f8f110886586b853f8846b2a87a8b6983650
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are obfuscated or use numeric slugs, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, aiming to deceive users into clicking them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://companionchampions.net/uploads/1/3/0/5/130588297/130588297.html#factorio+creative+mode+mod
    • http://bombardierrealestate.com/uploads/1/3/0/3/130323161/4503708.pdf
    • http://forge-x.media/uploads/1/3/0/7/130775819/3033177.pdf
    • http://rfcbardstown.com/uploads/1/3/0/7/130739449/jojuk-wijuledeb-govawotuweboko.pdf
    • http://keenansafetysolutions.info/uploads/1/3/0/2/130272554/6633110.pdf
    • http://yellowpayhk.com/uploads/1/3/0/7/130776735/4390156.pdf
    • http://dinc.di-gc.com/uploads/1/3/0/5/130551176/pebil-fuvaxa-zajexulikifex-vawanefire.pdf
    • http://sistahs.solutions/uploads/1/3/0/2/130289782/6114f4f.pdf
    • http://fountainheadgroup.org/uploads/1/3/0/5/130551727/b918454c3f8290.pdf
    • http://horizonsindianapolis.com/uploads/1/3/0/8/130814020/ginaxexawoni_fobamajun.pdf
    • http://companionchampions.net/uploads/1/3/0/5/130588297/terms.html
    • http://companionchampions.net/uploads/1/3/0/5/130588297/dmca.html
    • http://companionchampions.net/uploads/1/3/0/5/130588297/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://kepetikojup.files.wordpress.com/2020/05/70396367078.pdf
    • https://sisudagaxa.files.wordpress.com/2020/06/90293659048.pdf
    • https://kusulubir.files.wordpress.com/2020/05/20710366011.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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b3.bin
4f53a54568684a735b894f97de490be2808728a016b7405027858a297271762c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B3 10320 bytes

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