Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bf55f7328bf869…

MALICIOUS

PDF

36.7 KB Created: 2020-05-26 01:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f30f392568ab3b247e4061d2c73a1fbe SHA-1: 4b21342cb6f3027984a9b824199962f54e2301eb SHA-256: 52bf55f7328bf869777d271377039a8ddcccc0fd2da90a1f2e6726755f4b4358
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains references to 'Ford expedition repair manual pdf' and embedded URLs, suggesting a lure to a link farm. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link farm, likely for content delivery or redirection to further malicious sites.

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://kingshotelsrussiansummary.devsite-1.com/uploads/1/3/0/5/130588960/130588960.html#ford+expedition+repair+manual+pdf
    • http://paris-lyon-japon.com/uploads/1/3/0/6/130621439/xaduzubakaxij.pdf
    • http://streamingmadeasy.com/uploads/1/3/1/4/131406535/piguzevu.pdf
    • http://almcommunity.org/uploads/1/3/0/2/130289702/vatabunaxegonariv.pdf
    • http://embutidosparis.com/uploads/1/3/0/5/130551823/9396549.pdf
    • http://beatdiabetesnow.org/uploads/1/3/1/3/131378899/2026526.pdf
    • http://flamehairstudios.com/uploads/1/3/0/7/130775136/5aab91d69.pdf
    • http://residencerosavirginia.com/uploads/1/3/1/4/131453623/883545.pdf
    • http://whm.tenny.biz/uploads/1/3/0/5/130588712/silifijurikajov.pdf
    • http://tawecw.com/uploads/1/3/0/2/130271116/5432514.pdf
    • http://greenwithenvyintdec.net/uploads/1/3/0/3/130379445/7ef4bf3.pdf
    • http://cpanel.tivestoboutique.com/uploads/1/3/0/6/130639333/1768725.pdf
    • http://cannisafe.com/uploads/1/3/0/5/130544413/dununozuteki.pdf
    • http://meksetor.org/uploads/1/3/0/9/130969834/7055493.pdf
    • http://rockygrove.org/uploads/1/3/1/4/131407691/cdab2808e0.pdf
    • http://oilsinthehouse.com/uploads/1/3/0/5/130539260/ribonujoxugo.pdf
    • http://digitalconsortium.io/uploads/1/3/0/5/130539218/sipagoweguwuvivogo.pdf
    • http://sparklingpolish.net/uploads/1/3/1/3/131380953/9827181.pdf
    • http://vagabondphilosopher.com/uploads/1/3/0/8/130874262/pabinatubega_kuberojiruze.pdf
    • http://henrydowning.net/uploads/1/3/0/8/130874010/898375.pdf
    • http://funktionelle.de/uploads/1/3/0/6/130639915/purexewaj-bamegesagajud.pdf
    • http://stepnupllc.org/uploads/1/3/1/6/131637171/patof.pdf
    • http://rocklivechicago.com/uploads/1/3/1/4/131407629/e0a718.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_off0000656f.bin
23bcc3ed2a109921590399ada7c4c5f449ac9c96fd8fb52601be1cb01fe13c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656F 9824 bytes

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