Malicious PDF — malware analysis report

Static analysis result for SHA-256 956973b534207920…

MALICIOUS

PDF

43.4 KB Created: 2020-03-18 10:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e4780961aa91ae0b7872c61c5010ae53 SHA-1: 48c111e712e5f03ac1f3e7ef7b67c0df6fa4e6fa SHA-256: 956973b534207920e09ced6d833c11560ba352633e5d4617aac5912c7380ff10
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files. This behavior is indicative of a link farm or a distribution mechanism for malicious content. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a series of external URLs, likely to host further malicious payloads or phishing content.

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://yaredimmtratax.com/uploads/1/3/0/7/130738955/130738955.html#que+es+cfr+incoterms
    • http://guillenpujol.net/uploads/1/3/0/5/130540182/2e4cb95be.pdf
    • http://solutioncities.org/uploads/1/3/0/8/130813945/5579075.pdf
    • http://www.haverhillelite.com/uploads/1/3/0/4/130476013/xivefijerurevil_likixolumezo_pawibororaj_ravogo.pdf
    • http://minchatholdings.com/uploads/1/3/0/6/130604098/94544.pdf
    • http://herreras.org/uploads/1/3/0/7/130739614/393a134433.pdf
    • http://synectic-films.com/uploads/1/3/0/6/130620755/pororuxamezigun.pdf
    • http://curriculum.rpstech.org/uploads/1/3/0/6/130640194/623f8f.pdf
    • http://www.info4urbiz.org/uploads/1/3/0/5/130548070/266204.pdf
    • http://www.rodrives.com/uploads/1/3/0/6/130621113/kavebemaferetu-dunaxipaxo-pudaxami.pdf
    • http://hostmaster.psychotherapywithhorses.co.uk/uploads/1/3/0/5/130550973/ca6137de7b8156.pdf
    • http://film-studio.london/uploads/1/3/0/6/130604547/fatupixa-wenuris-tiwezobup.pdf
    • http://greenearthunited.com/uploads/1/3/0/7/130775199/sesakokam-misuvasonejepa-mogowan.pdf
    • http://findingyourarrow.com/uploads/1/3/0/3/130323531/5696829.pdf
    • http://sdesworks.org/uploads/1/3/0/6/130604401/tujuzurosenilonun.pdf
    • http://ekcoelearningcommons.com/uploads/1/3/0/4/130436399/piluwoguw.pdf
    • http://barbaramars.com/uploads/1/3/0/7/130776034/jexiwaje.pdf
    • http://smithvillecommunityinaction.info/uploads/1/3/0/3/130323466/kadolofaketel_majizuzuxatiw.pdf
    • http://pierrotcolombine.com/uploads/1/3/0/8/130813381/gulegazibudato.pdf
    • http://recessprojectglobal.org/uploads/1/3/0/2/130271111/31d1b26a9412.pdf
    • http://mytimemassaggi.com/uploads/1/3/0/4/130483294/tiwoteboxeturofe.pdf
    • http://onboardxpress.com/uploads/1/3/0/5/130551257/tazavabuxujato_xeduwelubatifuw_nuzire_fokixafixi.pdf
    • http://www.e-cigs-warehouse.com/uploads/1/3/0/6/130639458/9581467.pdf
    • http://decojewelry.net/uploads/1/3/0/7/130775570/gejowoxe_bevop_gubaxunuzibaja_kugipiletak.pdf
    • http://averybrown.org/uploads/1/3/0/5/130551218/gebitibedig.pdf
    • http://webmail.technoweld.net/uploads/1/3/0/6/130603917/nijebaral-wasijuvusu-lerawa-befojajo.pdf
    • http://decojewelry.net/uploads/1/3/0/7/130775570/g
    • 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_off00007e42.bin
07626e60f2c37aea6fa8f50d99a65ca9384d238368213460fe652a5f91cb04a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E42 8856 bytes

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