Malicious PDF — malware analysis report

Static analysis result for SHA-256 682473bba676d7b6…

MALICIOUS

PDF

38.7 KB Created: 2020-05-22 06:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 204f4c0f04fc2839f69e83acbdc2a4cd SHA-1: 82f0e890de8922a38241404ada1b530ad22f085b SHA-256: 682473bba676d7b6dbd3b30bc732161db25845ef599a729011a55f58662c0f23
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, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. These links likely serve to redirect users to SEO spam pages or to host additional malicious content, making the primary attack pattern the distribution of unwanted or harmful content via a link farm.

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://74-123-73-159.mgwnet.com/uploads/1/3/0/5/130546937/130546937.html#magic+guide+runescape
    • http://franklinjgreene.com/uploads/1/3/1/3/131378898/gogub_dasasomikined_baxakelinoz_venomaxuluwute.pdf
    • http://mamascleaningservices.com/uploads/1/3/0/6/130639385/visezagakepop.pdf
    • http://costumespropssets.com/uploads/1/3/0/6/130639679/gosakegaz_ludopul_sudagi_powevepupe.pdf
    • http://dywakefield.com/uploads/1/3/0/5/130589002/lanuwugoxalivizeze.pdf
    • http://stagefreesellfast.com/uploads/1/3/0/6/130603763/9473128.pdf
    • http://dickinsongrowthconnector.com/uploads/1/3/1/8/131856809/88851f4721a.pdf
    • http://sunnyvalespikers.com/uploads/1/3/0/5/130540619/8414012.pdf
    • http://schmabaret.com/uploads/1/3/1/0/131070890/danoxojejexarawe.pdf
    • http://organicbabyfoodshop.com/uploads/1/3/0/8/130874379/pekisagefepok.pdf
    • http://crazyfunart.com/uploads/1/3/0/7/130740316/xevusefojejam.pdf
    • http://mydeckstairity.com/uploads/1/3/0/6/130639609/wurisalupa_lalunal.pdf
    • http://prayingforreign.com/uploads/1/3/0/6/130604787/6905569.pdf
    • http://aircheckmoncton.com/uploads/1/3/0/7/130738525/1686705.pdf
    • http://thecargiles.com/uploads/1/3/1/1/131163712/pimimenalik_kogemegedifa_pipifufevejodax_jejiz.pdf
    • http://goodguppy.com/uploads/1/3/0/7/130739475/sawibunal-domof-vesagawapisu-xemufogalakafe.pdf
    • http://anitamorrissey.com/uploads/1/3/1/6/131607005/4675052.pdf
    • http://ranaiman.net/uploads/1/3/0/2/130288379/jerogogawapisi.pdf
    • http://kines-club.com/uploads/1/3/0/5/130544694/27219998.pdf
    • http://theunsinkableband.com/uploads/1/3/0/6/130621800/mewam.pdf
    • http://ugast.com/uploads/1/3/0/4/130483167/rigezi_gusudir_gisidero.pdf
    • http://hcffmc15.com/uploads/1/3/1/4/131438128/pomivixojovol.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_off00006cd3.bin
70cbbd9f0b09b14e14e676fb7b5a5ae7e34cbef0d8b8f67a72934ef0936fdc1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD3 10060 bytes

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