Malicious PDF — malware analysis report

Static analysis result for SHA-256 150f1ac8a059d0e6…

MALICIOUS

PDF

40.4 KB Created: 2020-03-16 18:36:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c6abcf936e5be5a1f0af7ec419f42b1a SHA-1: b0719597337c126beae97e8793458a83e7f855ba SHA-256: 150f1ac8a059d0e6d1df5ea24dd0faedde94aced100f3c3243d13941c67d0b35
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though partially corrupted, contains a URL that is also present in the list of external links, suggesting a coordinated effort to direct users to external resources. The primary goal appears to be SEO manipulation or the distribution of further malicious content.

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://xrossingborders.net/uploads/1/3/0/5/130590244/130590244.html#entorno+tecnologico+de+la+empresa+bimbo
    • http://kukuromance.com/uploads/1/3/0/5/130588290/retivir.pdf
    • http://ceticubatours.com/uploads/1/3/0/4/130477310/baxadugivunituri.pdf
    • http://lovelyuntamedrituals.com/uploads/1/3/1/0/131070645/4906614.pdf
    • http://andreaortega.com/uploads/1/3/0/5/130589238/7518586.pdf
    • http://www.napervilleroofingrepair.com/uploads/1/3/0/3/130379174/guxowaxod.pdf
    • http://jf-datatechniek.com/uploads/1/3/0/3/130313087/6795228.pdf
    • http://abileneandbeyond.com/uploads/1/3/0/4/130494871/5602533.pdf
    • http://cssrobotics.com/uploads/1/3/0/4/130478106/6554535.pdf
    • http://www.jarely.com/uploads/1/3/0/6/130621277/gijabijoxixadivifuri.pdf
    • http://www.couragethroughcancer.com/uploads/1/3/0/7/130740053/sifiwa.pdf
    • http://stephaniestrenger.com/uploads/1/3/0/5/130539497/2506f.pdf
    • http://www.italtradesrl.eu/uploads/1/3/0/7/130775640/4896487.pdf
    • http://mymonarchs.com/uploads/1/3/0/3/130379522/jefavetogutufepemofa.pdf
    • http://glassfulconsulting.com/uploads/1/3/0/7/130776745/perilidawivi-disikatolubeg.pdf
    • http://www.sovereignhearthealing.com/uploads/1/3/0/5/130588395/dizidesivoxe_juvulinibobedor.pdf
    • http://ta65dealers.com/uploads/1/3/0/7/130739971/86112f32c6.pdf
    • http://www.janboersmeulaentien.nl/uploads/1/3/0/4/130489465/9823362.pdf
    • http://www.snipzhairstudiogray.com/uploads/1/3/0/8/130813604/9663392.pdf
    • http://babywendtadoptiondash.com/uploads/1/3/0/5/130546118/9705912.pdf
    • http://pawsacrosstheborder.net/uploads/1/3/0/8/130813851/nasagifisefi_repimevitolig_wemonox.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_off00007449.bin
fdeb2e94ad3916541da18d734c0a00ccbe4753b31c9f0dd0107a6f525115d4fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 8744 bytes

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