Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0eb02da5645d25…

MALICIOUS

PDF

43.6 KB Created: 2020-06-11 22:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f67af34778fb097c0c1e2bcdb2db6d66 SHA-1: 63c1111c06bb22218c11b711b48cd887fac3725e SHA-256: bf0eb02da5645d259467c257ea73b7363d113570c4f09bf10cad095ba36f90c0
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The primary external URI points to a page that appears to be a lure, disguised as a manual. The ML classifier strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload execution.

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://bopaypershowent.com/uploads/1/3/0/6/130620674/130620674.html#frsky+dht+manual
    • http://ashleycharter.com/uploads/1/3/1/4/131437100/1900607.pdf
    • http://dabjunkremoval.net/uploads/1/3/0/3/130313468/vifela.pdf
    • http://inclusivejourney.net/uploads/1/3/0/2/130288381/pitetazora-jalimus.pdf
    • http://info.artisan-frames.com/uploads/1/3/1/4/131452814/8250617.pdf
    • http://avancehotelpalmsprings.com/uploads/1/3/0/6/130604366/6198201.pdf
    • http://mymoneo.art/uploads/1/3/0/4/130490833/8466721.pdf
    • http://daniel-pascual.com/uploads/1/3/0/6/130639699/tugotijixisur.pdf
    • http://zachzorba.com/uploads/1/3/2/3/132303339/00d5e1b755a.pdf
    • http://joncloudinc.com/uploads/1/3/0/6/130621376/c16153096120.pdf
    • http://lavonvanwilliams.com/uploads/1/3/0/5/130590008/52a92ef7fae.pdf
    • http://radiosam.net/uploads/1/3/0/3/130313111/purukikozidu.pdf
    • https://gadaxug.files.wordpress.com/2020/06/92459574639.pdf
    • https://repotava.files.wordpress.com/2020/06/megebivor.pdf
    • https://kimoripal.files.wordpress.com/2020/06/kogewolamebosusenizob.pdf
    • https://sozibibuji.files.wordpress.com/2020/06/damawinolepabojadebofugi.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_off00007d55.bin
485273420ddc3719550ff1a74278ae55b963f6cde02c0f65054f40ec27687468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D55 11024 bytes

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