Malicious PDF — malware analysis report

Static analysis result for SHA-256 789f593df49a1f78…

MALICIOUS

PDF

35.6 KB Created: 2020-05-16 03:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e43aea7a1e5bec8f1e0e1f68c81dc479 SHA-1: 4b3d0e717257c62598ae7f1f646fa99238bee37c SHA-256: 789f593df49a1f78a0a4268807d604a8cc681661c82d2e03c4b51827f263fc58
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Appvalley vip ios free'. The presence of numerous external links suggests an attempt to redirect users to potentially malicious websites or to manipulate search engine results. No scripts were extracted, but the structure and link farm indicate a malicious intent to drive traffic to external resources.

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://rbpearl.net/uploads/1/3/0/7/130738700/130738700.html#appvalley+vip++ios+free
    • http://netkonnectus.com/uploads/1/3/1/4/131405976/xetewubejilaketatir.pdf
    • http://trbcchoir.org/uploads/1/3/0/7/130739152/kixorupin.pdf
    • http://innarc.com/uploads/1/3/0/8/130873807/wegavejizalet.pdf
    • http://destinedmarketing.com/uploads/1/3/0/6/130604417/9676d113ee1157b.pdf
    • http://skysthelimitsanctuary.org/uploads/1/3/0/5/130551654/kopesadenulebe_pibojul.pdf
    • http://rdn-artdesign.com/uploads/1/3/0/5/130551073/4956529.pdf
    • http://thelaunchpadllc.com/uploads/1/3/0/6/130639406/5252841.pdf
    • http://kenzierustonlegacy.com/uploads/1/3/1/1/131164549/viriz-bekazamolenajos.pdf
    • http://indiglowgal.com/uploads/1/3/0/8/130874519/ribeboruro.pdf
    • http://techeducation.ca/uploads/1/3/0/9/130969346/vulizerisiwanuxiwiti.pdf
    • http://jabspainting.com/uploads/1/3/0/9/130969082/f1c0b11d3.pdf
    • http://wooferseu.com/uploads/1/3/0/8/130813998/0961e64fd31.pdf
    • http://jkmcivil.com/uploads/1/3/0/9/130969840/4351430.pdf
    • http://maynrenobuild.com/uploads/1/3/0/3/130313585/88bb6e.pdf
    • http://sagewoodcenter.dev/uploads/1/3/1/3/131382223/c247f9d.pdf
    • http://creategottadoit.com/uploads/1/3/1/6/131636651/raseta.pdf
    • http://teamnew.net/uploads/1/3/0/2/130272548/waxosuwubirusasuko.pdf
    • http://theraindropper.com/uploads/1/3/0/4/130483978/dukumipefisi.pdf
    • http://kosports.org/uploads/1/3/1/8/131872138/bazeman-timetanezo.pdf
    • http://nolitafilmfestival.net/uploads/1/3/0/4/130436141/4889d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f17.bin
d3f699eac179a374148527d4d98b9883f22d88104b9f5b619f4fc4c652dbb41c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 10488 bytes

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