Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf786372dfe55be…

MALICIOUS

PDF

42.5 KB Created: 2020-03-11 09:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f79c5290da4d8048ebe987a3d9c2d03a SHA-1: 064d1c8ea2d840391d5e8f6be189b45318d083a9 SHA-256: 4cf786372dfe55bec57898d23eafa8f440c08c366e57e58ee1c7a31a99620114
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The document body contains a seemingly unrelated title ('Sears 10 radial arm saw parts') which may be a lure to attract clicks to the embedded URLs.

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://a1159608xstreamtravel.xsideas.com/uploads/1/3/0/7/130776150/130776150.html#sears+10+radial+arm+saw+parts
    • http://terraholdinggroup.com/uploads/1/3/0/3/130323697/xepufebixexofo.pdf
    • http://www.traumainformedlensyoga.com/uploads/1/3/0/9/130969664/1c380caaea78.pdf
    • http://ibcglobal-japan.com/uploads/1/3/0/6/130604299/fa05304b6e2a5.pdf
    • http://1skylane.org/uploads/1/3/0/3/130313603/jupuxubexipepano.pdf
    • http://porschasdivinediamonds.com/uploads/1/3/0/6/130604369/9702415.pdf
    • http://desertchillair.com/uploads/1/3/0/8/130873861/606337a7fe0a6e.pdf
    • http://kaorieventos.com.co/uploads/1/3/0/2/130272485/zesabegaz.pdf
    • http://oldsagepublishing.com/uploads/1/3/0/8/130874276/1309559.pdf
    • http://eduplusltd.com/uploads/1/3/0/5/130588206/b8e2852ea847f9c.pdf
    • http://sidewalksteve.com/uploads/1/3/0/7/130776499/sulivivakekudejujov.pdf
    • http://laurenandlouise.com/uploads/1/3/0/6/130621946/d3e3ed69f.pdf
    • http://www.powerteamtriadrealestate.com/uploads/1/3/0/4/130488087/givekamenobi.pdf
    • http://talesoftwotravelers.com/uploads/1/3/0/2/130287972/da9eacff7dc6853.pdf
    • http://imprentaonlinebarcelona.cat/uploads/1/3/0/2/130288559/3865311.pdf
    • http://trickhorse.net/uploads/1/3/0/5/130589205/3e80c533e3b300.pdf
    • http://www.baerlinlimousine.de/uploads/1/3/0/4/130476818/kisadukogu-kolusa-tegifitir.pdf
    • http://madisonmediator.com/uploads/1/3/0/5/130540197/pexinipufaw.pdf
    • http://thebrickbombers.com/uploads/1/3/0/3/130313612/8153744.pdf
    • http://www.foundationforburnrehab.org/uploads/1/3/0/5/130551618/gabezolexukovamavoza.pdf
    • http://cherishedmomentsphotography.org/uploads/1/3/0/8/130873983/9702779.pdf
    • http://kimberlysbelleboutique.com/uploads/1/3/0/8/130813953/2094327.pdf
    • http://digi-done.com/uploads/1/3/0/8/130874240/06a23e5dda03df.pdf
    • http://www.nugrun.info/uploads/1/3/0/5/130550683/jisuwub.pdf
    • http://pourspoutmanufacturer.net/uploads/1/3/0/6/130639557/vibezuf-xiputa-bofuvepepowu.pdf
    • http://pourspoutmanufacturer
    • 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_off00007dfa.bin
da610fad3ceaaa68775df2ab969db560d8d98e61db51d76cbe5af8f005ed17d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 7344 bytes

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