Malicious PDF — malware analysis report

Static analysis result for SHA-256 9608ab52c3c830ae…

MALICIOUS

PDF

41.3 KB Created: 2020-04-01 18:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cd2a31a98aa8dec7baeafce47ebed10b SHA-1: 57bf1a629ef7826512db3f7926da41f79c03b199 SHA-256: 9608ab52c3c830aea419e3d508640b3cc063ed84c0f03714077a546f0835d39c
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 point to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or to obscure the true origin of a threat. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the numerous external links.

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://abraxasroots.org/uploads/1/3/0/6/130621511/130621511.html#the+practicing+mind+pdf+drive
    • http://peterwinch.com/uploads/1/3/0/7/130776229/f0e155.pdf
    • http://zzxteriors.com/uploads/1/3/0/2/130272587/kexabefafetupod.pdf
    • http://thewandererreturns.com/uploads/1/3/0/2/130270882/pumawal.pdf
    • http://whatthehulla.net/uploads/1/3/0/5/130546209/1813523.pdf
    • http://operationneurolink.org/uploads/1/3/0/2/130271187/josegupideb_ravite_sesoguvowenerav.pdf
    • http://landmarkinstallnow.com/uploads/1/3/0/7/130775295/kofoditen-povaziji-vigikexobija.pdf
    • http://wixomtowingservice.com/uploads/1/3/1/1/131164406/gigotupabonakud-dusebi-dopumerudowo-sawepa.pdf
    • http://honda2008.com/uploads/1/3/0/5/130551714/bb51e38.pdf
    • http://thebeginningyears.com/uploads/1/3/0/2/130272973/41cabe69d3.pdf
    • http://sse3312dbqtheundergroundrailroad.com/uploads/1/3/0/7/130739540/walokumenojamujiwo.pdf
    • http://theworldnearby.shop/uploads/1/3/0/6/130621109/luboxapopaxog-nitabapuzatatu-bitowikodaled-xobet.pdf
    • http://rainboascales.com/uploads/1/3/0/5/130589054/nuvilitavumu.pdf
    • http://pattersonherefordandangusranch.com/uploads/1/3/0/2/130270993/balob-nufumojeso-todojobo-salanoxiboko.pdf
    • http://xanadu.gallery/uploads/1/3/0/8/130874519/5803931.pdf
    • http://yoopershopper.com/uploads/1/3/0/2/130289541/serijop.pdf
    • http://disobedientwomen.org/uploads/1/3/0/9/130969959/pelafeji.pdf
    • http://sobilventures.com/uploads/1/3/0/7/130775278/dexuronozelakipux.pdf
    • http://tourbility.com/uploads/1/3/0/7/130738974/mexebenetuko_wovanetesev_jelimaxido_dofanelerumun.pdf
    • http://azariahbooks.com/uploads/1/3/0/8/130814652/9202198.pdf
    • http://centralalbertaseptic.com/uploads/1/3/1/4/131437566/bedixakipif.pdf
    • http://fsc-nationwide.com/uploads/1/3/1/3/131379948/fewix.pdf
    • http://btdtguru.com/uploads/1/3/0/2/130291707/970752.pdf
    • http://naturestouchirrigation.com/uploads/1/3/0/4/130477192/widuxizizetivutaw.pdf
    • http://thevisiongal.com/uploads/1/3/0/9/130969999/nezuduxex-gafov-gipetogovix.pdf
    • http://naturestouchirrigation.com/uploa
    • 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_off000079fe.bin
bba409724bc1459cedd605476c3d6c595557f9526c7ce7afd342cd99d079994f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FE 7620 bytes

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