Malicious PDF — malware analysis report

Static analysis result for SHA-256 555ce2d243b5b95e…

MALICIOUS

PDF

31.5 KB Created: 2020-05-23 23:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed3607d17ec9e9672111c6b14eea95a5 SHA-1: 5b3c6c13c4f1081b399e26d24a14f7e987b253b1 SHA-256: 555ce2d243b5b95ee1bb59aedbfccc6b7b83cdc492a17b1a83adf560c60bcc69
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDF files. The primary lure appears to be a fake download for 'Sony Vegas Pro 12', as indicated by the document body and one of the extracted URLs. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to distribute potentially unwanted or malicious software through a deceptive download lure.

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://heturecycle.se/uploads/1/3/0/4/130483869/130483869.html#sony+vegas+pro+12+download+free
    • http://publicinfo.dk/uploads/1/3/0/8/130813715/komudukufana.pdf
    • http://reingenieriaactitudinal.com/uploads/1/3/0/4/130483928/8928d28.pdf
    • http://globalsupplyanddistribution.com/uploads/1/3/1/3/131382232/jezuratemeraka-jupumubojumo.pdf
    • http://flcboutique.shop/uploads/1/3/0/6/130621847/xokojefepagevadop.pdf
    • http://lauriecampbellwcsd.com/uploads/1/3/0/8/130814788/xalofuxoxelaja.pdf
    • http://pointofuse.com/uploads/1/3/0/4/130483207/9dd27b.pdf
    • http://khocolateisc.com/uploads/1/3/0/5/130590511/5988529.pdf
    • http://starspangledbrewing.com/uploads/1/3/0/7/130776241/7f02d064.pdf
    • http://snowdogsofthegreatlakes.com/uploads/1/3/0/7/130740330/b3f1d.pdf
    • http://sweetjarcreations.com/uploads/1/3/0/3/130323506/340a7.pdf
    • http://privacypolicypetition.org/uploads/1/3/0/8/130873818/kuduvev.pdf
    • http://thymeisonmyside.com/uploads/1/3/0/7/130738993/8332182.pdf
    • http://cardsmovinginc.com/uploads/1/3/0/6/130604939/171c08.pdf
    • http://mycarecounseling.org/uploads/1/3/0/5/130590162/ec762563e5b9.pdf
    • http://sometimesagirlsjustgotta.com/uploads/1/3/0/4/130435511/xurepewom-nosumof-zodivix.pdf
    • http://eeinterpreters.com/uploads/1/3/0/7/130739535/6b8bfbf50.pdf
    • http://awakenjoyfulspirit.com/uploads/1/3/0/5/130538859/7978188.pdf
    • http://bikithikit.com/uploads/1/3/0/8/130814441/vuwomokilirapawa.pdf
    • http://saintjohnlodge5.com/uploads/1/3/0/4/130476493/ludatipig.pdf
    • http://conceptionconstruction.net/uploads/1/3/0/7/130739158/noxasonogo.pdf
    • http://anthony2019.net/uploads/1/3/1/3/131379555/xoputoselixudonibom.pdf
    • http://richmansburdenthefilm.com/uploads/1/3/1/4/131437948/zenuwidekeduxo.pdf
    • http://dhuni.net/uploads/1/3/0/4/130476298/wowipazip.pdf
    • http://mrdata.shop/uploads/1/3/0/3/130379461/54f34ae9.pdf
    • http://tbbnx.com/uploads/1/3/0/5/130551523/vonetemoleda_nevevukubevizal_fafikebapoliva_tikufipu.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_off0000534c.bin
8b87a15c6148acd5985b5008f8c82ec4fb4ab6290403e5b6e1bbb81207c73d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534C 8908 bytes

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