Malicious PDF — malware analysis report

Static analysis result for SHA-256 199f6b8df6b16e94…

MALICIOUS

PDF

48.5 KB Created: 2020-04-02 20:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4e7e56953c8cf09004aee3682909c3f6 SHA-1: 805316bf91d9545f604366f011cb1e00d30e9ae4 SHA-256: 199f6b8df6b16e94ec635beadbb5813e26660f5c511bafc53de5ef1d5b1341ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. These links likely serve to manipulate search engine rankings or redirect users to potentially harmful content, rather than providing legitimate information.

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://creationsofrae.com/uploads/1/3/0/7/130739830/130739830.html#top+laptops+review
    • http://kylemgreen.com/uploads/1/3/0/6/130620841/1396663.pdf
    • http://pzmz.net/uploads/1/3/0/7/130739680/jutodupaziti_zizix_vanabine_gekezej.pdf
    • http://peacefullivingsolutions.com/uploads/1/3/0/3/130379341/rusavetosifi-niloxovizo.pdf
    • http://amenbrown.com/uploads/1/3/0/5/130588864/molekobiw-lamorox-xafakipimifekug-vesomaniduvara.pdf
    • http://postcardsfrombudapest.com/uploads/1/3/0/8/130814050/zepazifuji.pdf
    • http://deleswaproductions.com/uploads/1/3/0/3/130323139/tojovatixisetek.pdf
    • http://floatglassdesigns.com/uploads/1/3/0/8/130813117/lolawuvib.pdf
    • http://www.restorationchurchag.org/uploads/1/3/0/7/130776130/rolupi-losalipedibunan.pdf
    • http://chatthillscommunity.com/uploads/1/3/0/6/130620668/wapofupuvibiro_vinubeva_soxifusasaviv.pdf
    • http://uptowndetailing.com/uploads/1/3/0/6/130621185/2500589.pdf
    • http://cynthiahyett.com/uploads/1/3/0/3/130379244/taboxonijubiruziwo.pdf
    • http://hylanasset.com/uploads/1/3/0/7/130776151/jarofu.pdf
    • http://fusiondesigntech.com/uploads/1/3/0/4/130483376/gisisiruwim_musamesefu.pdf
    • http://genrhs.org/uploads/1/3/0/7/130776132/7995902.pdf
    • http://dccircular.com/uploads/1/3/0/5/130551882/xizen-nowuxujuzez-gisinixi-jalimo.pdf
    • http://aguadecalornatural.com/uploads/1/3/0/4/130435670/jepugojomil-metajokin.pdf
    • http://gimeproductions.com/uploads/1/3/0/8/130814636/e7504ef22a.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_off00009420.bin
b6cb293cd173124bb1e3089c177f9ea299f56b6e654dddd87a5c72eba107fc26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9420 8604 bytes

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