Malicious PDF — malware analysis report

Static analysis result for SHA-256 77607773ecdb1fd6…

MALICIOUS

PDF

34.3 KB Created: 2020-05-22 15:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14b3d0d14004dc3454e695458e4dd620 SHA-1: 61ae79983d9913e8b5136b25c47f99f2d4205a7e SHA-256: 77607773ecdb1fd6116217487bd02b25d2af0c3169574dd59dbaa7b9150d69f1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, many of which point to other PDF files. The document body suggests a lure for online content, likely to direct users to malicious sites. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, a common tactic for SEO manipulation or distributing malware.

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://molexastucco.com/uploads/1/3/0/6/130639891/130639891.html#ver+telefe+ao+vivo+hd+on-line+gr%25C3%25A1tis
    • http://oceanhealthcoach.com/uploads/1/3/1/6/131606047/gagadaziluvew.pdf
    • http://femaleauctioneers.com/uploads/1/3/1/3/131379037/panik-gorof.pdf
    • http://acikhatal.com/uploads/1/3/0/5/130588475/ce99a0aa3d406.pdf
    • http://conqueryourpain.net/uploads/1/3/1/4/131454027/fugin-rixamalirep-moborol-virisub.pdf
    • http://learnhealing.org/uploads/1/3/0/6/130639803/f65f025b.pdf
    • http://0010110.xyz/uploads/1/3/0/9/130968937/bafela-fezoxuwu-xotud.pdf
    • http://kinderlates.com/uploads/1/3/0/4/130476204/2acac1.pdf
    • http://e-stringer.com/uploads/1/3/0/7/130776158/e603f31f92db094.pdf
    • http://epiclifestylemanagement.com/uploads/1/3/1/8/131856887/dakozukibomebikuzub.pdf
    • http://sidneyhorowitz.com/uploads/1/3/2/3/132303229/davemulug-ragixutigoren-fefinafaraxu.pdf
    • http://victoriaproofing.com/uploads/1/3/0/8/130873869/lulufafagugoz-monub-fujakiruj.pdf
    • http://lauralehew.org/uploads/1/3/0/6/130639655/c67ab16f9f38711.pdf
    • http://bhealthyfreshfoodmarket.net/uploads/1/3/1/0/131070010/vozaguluk_xamiva_bopasis_vulatakof.pdf
    • http://gallaghertrainingsystems.com/uploads/1/3/1/4/131437535/pipodese-gemebatisuwek-jafutiwudafo-pofoza.pdf
    • http://beansandbins.com/uploads/1/3/0/5/130544938/zodunozipanabebubeje.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_off000055ce.bin
db1a46b07cc0eba6eed34d4d9c0b0a2c916b3b4e0815c5c6862dae007366fff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55CE 11596 bytes

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