Malicious PDF — malware analysis report

Static analysis result for SHA-256 4087fac184dd2e44…

MALICIOUS

PDF

41.8 KB Created: 2020-03-29 05:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ce8145f25a9df46eefdbe659a4735f1 SHA-1: 6899c9cfd5b030f1dcb459801ab928fac57ef022 SHA-256: 4087fac184dd2e44048a4f06828f38793352ddd2696b325c3bb6f9aba3c85dff
92 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are dynamically generated and point to PDF files. The document body presents a fake "HP boot error" message to trick the user into clicking on one of the malicious links. The PDF_SEO_LINK_FARM heuristic indicates a link farm strategy, and the ML_NYX_PDF_MALICIOUS model strongly classified it as malicious. The primary IOC is the initial lure URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://shardexplorers.com/uploads/1/3/1/4/131437957/131437957.html#hp+boot+error+3f0
    • http://mail.sunsetsupplies.com/uploads/1/3/0/5/130588487/rixun.pdf
    • http://thepenetwork.com/uploads/1/3/0/6/130640047/motofesezajibif-wuzopuxajoki-zukaxugajejel.pdf
    • http://extractvaluenow.com/uploads/1/3/0/7/130738978/numurapa-panoxuveki-kuxivinarevofak.pdf
    • http://daisyscloset.net/uploads/1/3/0/6/130604306/norovi.pdf
    • http://wiltondentist.com/uploads/1/3/0/7/130739206/sapix_kibefutiral.pdf
    • http://autodiscover.gardensourcesc.org/uploads/1/3/0/6/130639946/zubamuviseduz_gikukufo_gutiloxezo.pdf
    • http://prospernola.org/uploads/1/3/0/7/130740097/zufapug-vavanituj.pdf
    • http://neilfoxhealthandfitness.com/uploads/1/3/0/7/130775986/4593662.pdf
    • http://nowbiz.net/uploads/1/3/0/4/130489038/zejojeri-saxepukebil.pdf
    • http://crtmailingsystemllc.com/uploads/1/3/0/7/130775529/fuxekiw.pdf
    • http://keepingupwiththeshaws.com/uploads/1/3/0/8/130814711/latufejop.pdf
    • http://localnannys.com/uploads/1/3/0/5/130541346/fded929df8bd.pdf
    • http://mail.navp.co.uk/uploads/1/3/0/8/130874627/somekigekegepup.pdf
    • http://1001brushstrokes.com/uploads/1/3/0/3/130379342/424554.pdf
    • http://dreleam.com/uploads/1/3/0/7/130775215/jemuzawiwexawa_pipabi_lupolojo_pogujeloj.pdf
    • http://thelohbros.com/uploads/1/3/0/4/130483041/d6dbeea77224baf.pdf
    • http://missionroadsdachurch.com/uploads/1/3/0/7/130775744/potikamu.pdf
    • http://digitalmortgagemarketers.com/uploads/1/3/0/2/130289395/fetafamorejilifojix.pdf
    • http://karmagirls.net/uploads/1/3/0/6/130639662/d15c6.pdf
    • http://locksandpuzzles.com/uploads/1/3/0/6/130605165/30766ffaaa65d2e.pdf
    • http://gigglespalace.com/uploads/1/3/0/9/130969274/1628737.pdf
    • http://atefofficial.com/uploads/1/3/0/5/130539774/narurafewa.pdf
    • http://innerfish.com/uploads/1/3/0/5/130551756/dewogalib.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_off0000788b.bin
afe91f1bc28c59bdc9aaf39754005f631bba3be1f9a95e80098a9cbe54d0c776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788B 8636 bytes

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