Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe51d2bcc70dd65c…

MALICIOUS

PDF

35.3 KB Created: 2020-05-24 07:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39e48a44370df13b74a4d1d8084e1d99 SHA-1: e98d3d14754b1cc98bd972100957044c68183cae SHA-256: fe51d2bcc70dd65cd2c5789675518534c837d6b5d73923e467028349e4938a2e
94 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The PDF_SEO_LINK_FARM heuristic specifically identified this pattern, indicating a mass of external links pointing to domains like juliefabulas.com and theothertd.com. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the extensive link farm designed to lure users to potentially harmful content.

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://theothertd.com/uploads/1/3/0/9/130969458/130969458.html#m%25E1%25BB%2599t+h%25E1%25BB%2597n+h%25E1%25BB%25A3p+x+g%25E1%25BB%2593m+6.5+gam+zn+v%25C3%25A0+4+8
    • http://juliefabulas.com/uploads/1/3/0/5/130588288/52d86ed.pdf
    • http://lonestarbeecompany.com/uploads/1/3/0/6/130622009/2fe509c8d268.pdf
    • http://financialvaluers.com/uploads/1/3/0/6/130604056/gipixizas.pdf
    • http://nitrotvtrial.com/uploads/1/3/0/7/130739933/bawoj.pdf
    • http://marcusbennettengineering.com/uploads/1/3/0/2/130272290/gijij.pdf
    • http://74-123-76-143.mgwnet.com/uploads/1/3/0/2/130289782/nakogibiru_zenoje_ninikaziw_libovowutalufa.pdf
    • http://crazyfoxfit.com/uploads/1/3/0/3/130313221/bitaxarixetojoxizo.pdf
    • http://garciasaezmedicalgroup.net/uploads/1/3/0/7/130738940/pepikafu_puvil_vopekeru.pdf
    • http://bensonhurstbarbellclub.com/uploads/1/3/0/5/130590482/408874e.pdf
    • http://musictheatercareers.com/uploads/1/3/1/8/131856479/31c60e2942c9.pdf
    • http://renoplumber.net/uploads/1/3/0/7/130740420/jadusujewilopib_vafufo_talam_muxojexavawiv.pdf
    • http://linked-together.com/uploads/1/3/1/4/131455247/75e83f8c6.pdf
    • http://josephpvusich.com/uploads/1/3/1/4/131408572/8555880.pdf
    • http://northpointmarketproposal.com/uploads/1/3/0/6/130604626/donos.pdf
    • http://swiftpowerwashingandpvc.com/uploads/1/3/0/4/130483215/lunazat-vetoxi-waluvi-nomojedavawot.pdf
    • http://marklachovsky.ca/uploads/1/3/0/7/130739686/kafewiv-fowotuvel-loxuvobibo.pdf
    • http://informaticacreativasc.es/uploads/1/3/0/3/130323469/3f32348117176.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_off000051ef.bin
2e6ffd33fe8bf705079b2a70c034199a904de5cdda9d220126ea11f79485caae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51EF 19432 bytes

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