Malicious PDF — malware analysis report

Static analysis result for SHA-256 167e54b23cedd00b…

MALICIOUS

PDF

51.2 KB Created: 2020-03-15 06:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 347de9ca23afa182a7718a126a516141 SHA-1: 83162685edaa2edb73be9894e69dde573c139677 SHA-256: 167e54b23cedd00beaa6e89b053ed58b1f8765bea05ffe49a2f1509eb597ebb2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files with numeric slugs, indicative of a link farm or SEO spam campaign. The document body mentions 'Boating license ontario answers', suggesting a lure to attract clicks. The presence of numerous external URLs and the ML classifier's high confidence score support a malicious verdict.

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://lisa-and-dustin.rominastiebenphotography.com/uploads/1/3/0/4/130483260/130483260.html#boating+license+ontario+answers
    • http://carentandvacancy.com/uploads/1/3/0/7/130740371/zugixadojuz_baxozeboxepaz_borukiwim.pdf
    • http://cofchristforesthills.org/uploads/1/3/0/6/130604192/zesipufuda.pdf
    • http://seafoodinternational.ca/uploads/1/3/0/7/130739502/jokikitinigu.pdf
    • http://liquidluau.net/uploads/1/3/0/7/130776457/denas.pdf
    • http://bodytransformationsforprofessionals.com/uploads/1/3/0/4/130488223/78751c.pdf
    • http://bestreporting.org/uploads/1/3/0/7/130738890/4cb1e0a025.pdf
    • http://thesharpetraveler.com/uploads/1/3/0/8/130814784/6827467.pdf
    • http://amari.website/uploads/1/3/0/3/130323932/pareves_wadotutusofope.pdf
    • http://beckervetclinic.com/uploads/1/3/0/5/130540065/7186855.pdf
    • http://pre.io/uploads/1/3/0/7/130776212/gunejedizemugudado.pdf
    • http://prosincar.com/uploads/1/3/0/3/130323158/woferofugagabovife.pdf
    • http://webdisk.courtfarmholidaybungalows.com/uploads/1/3/0/9/130969331/sokugetizo.pdf
    • http://thatclassiccarshow.com/uploads/1/3/0/7/130775142/xabimev_mosanidamofivi.pdf
    • http://medicalbillreviewersllc.com/uploads/1/3/0/4/130435922/xetagidojef.pdf
    • http://torbeck.net/uploads/1/3/0/6/130639537/fifapavavasoj.pdf
    • http://mta-sts.mail.myfiorella.com/uploads/1/3/0/5/130588319/8696338.pdf
    • http://msalaya.com/uploads/1/3/0/4/130490643/puvibeg.pdf
    • http://www.trophybearer.org/uploads/1/3/0/2/130288630/jozavititenup.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_off0000a078.bin
59ef61e272f742077c5b525e9369e5c3bb882cbcf6fbb4e53011d5c6e3b032f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA078 7904 bytes

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