Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc39f06fe7f3d244…

MALICIOUS

PDF

41.0 KB Created: 2020-05-15 01:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2384b552fa859f0a05f501ad66424f5e SHA-1: 02e5088563e5f37cf4c95ff785b22ec22d8794b4 SHA-256: fc39f06fe7f3d244e49649663a3a2afcb63809ae851149c7ee4314b631b5dde8
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier also strongly indicated maliciousness. This suggests the document is part of an SEO spam campaign or a link farm designed to distribute malicious content or drive traffic to compromised sites.

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://wise-team.com/uploads/1/3/0/6/130604317/130604317.html#fellsmere+reservoir+fishing+report
    • http://sassyhopes.com/uploads/1/3/0/7/130776553/papomajesunizori.pdf
    • http://christianlifeministryofyoungstown.org/uploads/1/3/0/5/130546385/af5c24.pdf
    • http://investingmind.net/uploads/1/3/1/6/131636858/fegirovupodasi_pevaverogozexa_julalotaxikijud_zumejajelixak.pdf
    • http://cardcoctions.com/uploads/1/3/0/8/130874122/sijujuparanu.pdf
    • http://baumgartner-inc.com/uploads/1/3/0/6/130620989/padosatajibepuguma.pdf
    • http://thebohemianbabies.com/uploads/1/3/0/2/130289278/zufoganexatulov-kosuzom-wilipa.pdf
    • http://tgfnfanfest.com/uploads/1/3/0/6/130604317/eba7c38f77f92.pdf
    • http://sawyercoshop.com/uploads/1/3/0/5/130550748/afc1055.pdf
    • http://northernbeacheshousecleaning.company/uploads/1/3/0/7/130739431/nutumuj.pdf
    • http://donnezonline.com/uploads/1/3/0/5/130590243/kemanafidibijisanaso.pdf
    • http://whats-the-risk.com/uploads/1/3/1/8/131871685/a0385efc0a.pdf
    • http://sharnema.info/uploads/1/3/1/0/131070080/5885647.pdf
    • http://bebelbelezaadomicilio.com/uploads/1/3/0/7/130776103/rababibo_wetax_biteledubur.pdf
    • http://jglucas.com/uploads/1/3/0/5/130542953/6f3e88c7592239.pdf
    • http://inwardvision.com/uploads/1/3/1/4/131452782/pifuv_borozisutik_fowimezuw_leposisimotarus.pdf
    • http://tennisinbusiness.org/uploads/1/3/0/4/130490602/93017d55.pdf
    • http://icuinvestigations.info/uploads/1/3/1/4/131483557/d3c5addac7470e.pdf
    • http://nfpinoc.com/uploads/1/3/0/6/130621592/fafupesevunula_remeko_xozonowul_didipite.pdf
    • http://buytolet.guru/uploads/1/3/0/6/130621780/814b12.pdf
    • http://tchobbs.com/uploads/1/3/1/3/131383514/6972402.pdf
    • http://scentsful.com/uploads/1/3/0/4/130488311/lukurojisu.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_off00007348.bin
c7c2395d845d1dbe1e85fcdea64404aa48c1e13387d8f49e74667fd3fa1e43ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7348 10832 bytes

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