Malicious PDF — malware analysis report

Static analysis result for SHA-256 077cdecb66245f72…

MALICIOUS

PDF

34.4 KB Created: 2020-04-02 23:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f1be636c7226cd9e060587c0cb30822a SHA-1: 5e41baeed05300376edb5e1f8f6c432972711897 SHA-256: 077cdecb66245f725a8ee110df98e40eccea7d706c3d86167c28981c34465356
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism for malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to redirect the user to malicious content, possibly for phishing or malware distribution.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://angelwellness.net/uploads/1/3/0/6/130620916/130620916.html#dr+michel+fahim+ottawa
    • http://revivehope.net/uploads/1/3/0/7/130740192/305669.pdf
    • http://treatui.com/uploads/1/3/0/3/130313193/zumuwuvuku.pdf
    • http://beastmonkey.co/uploads/1/3/0/6/130621814/411807.pdf
    • http://nevb-unity.net/uploads/1/3/0/3/130323422/5483313.pdf
    • http://aunaturalebynaomi.com/uploads/1/3/0/9/130969462/fewana.pdf
    • http://undergroundnutrients.com/uploads/1/3/0/8/130815013/afd59fcc.pdf
    • http://busybeesdisposal.com/uploads/1/3/0/9/130969236/ridenopugurisewod.pdf
    • http://karleykolors.org/uploads/1/3/0/5/130588202/lepefopisutolurawopu.pdf
    • http://joledac.store/uploads/1/3/0/2/130288318/9713890.pdf
    • http://usdaum.one/uploads/1/3/1/3/131379262/dononi.pdf
    • http://createdbyvalsco.com/uploads/1/3/1/3/131382148/6105864.pdf
    • http://altasanacion.net/uploads/1/3/0/7/130738970/2666243.pdf
    • http://haventruck.com/uploads/1/3/0/8/130874497/221848.pdf
    • http://hostmaster.maggiemonroe.nl/uploads/1/3/0/8/130874012/0df54b4c.pdf
    • http://9f60fpk005.com/uploads/1/3/0/2/130291328/lerudiberazug.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_off00005f97.bin
860e20cd7d92599fb87aa997a6e95e02d8c26a103cbffc4aabfa32d40e4ceab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 7404 bytes

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