Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69421057d0684ed…

MALICIOUS

PDF

41.6 KB Created: 2020-03-22 04:11:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 109c622de571120aab0f9aa46ea17dfe SHA-1: 7abf8eacdd6e858848029cf3f8f410dfd3b76ed7 SHA-256: b69421057d0684ed30c47bc382617aa136e4e7949d24a50a150ce291c116d280
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The primary attack pattern observed is the creation of a link farm, directing users to numerous external PDF files hosted on various domains.

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://mynaturalhairspa.com/uploads/1/3/0/9/130969242/130969242.html#waterfire+saga+book+3
    • http://appartementverhuur.com/uploads/1/3/0/2/130271080/sopafowadipefod-gefofuzalorokuv-minemer-modawelojomax.pdf
    • http://teachersinmotion.com/uploads/1/3/0/7/130739301/virafewof.pdf
    • http://bagsofun.co.uk/uploads/1/3/0/6/130604583/satuxoxerupolabimo.pdf
    • http://tandbpest.com/uploads/1/3/0/6/130605387/51065.pdf
    • http://mail.shotokankarate.net/uploads/1/3/0/6/130639935/9184795.pdf
    • http://drmeghandvm.com/uploads/1/3/0/3/130323401/e5ce7c84ee68435.pdf
    • http://obtainablewellness.com/uploads/1/3/0/7/130738859/zapaj.pdf
    • http://x0877193xstreamtravel.xsideas.com/uploads/1/3/0/7/130739023/lurutejudizuv.pdf
    • http://mysisterscupcakes.com/uploads/1/3/0/4/130489351/wigalugoxaxif_wepave_dabez_kezojav.pdf
    • http://lipstickliberalnetwork.net/uploads/1/3/0/4/130476516/648cf93f.pdf
    • http://thehealthygroove.com/uploads/1/3/0/5/130550754/zebeduma.pdf
    • http://larsonwatercolors.com/uploads/1/3/1/0/131070498/dukozusujokob.pdf
    • http://journeytomichelin.com/uploads/1/3/0/5/130590356/vosuxu.pdf
    • http://mrwaterheater.net/uploads/1/3/0/8/130813516/637147.pdf
    • http://mta-sts.mx.animalhospitalofpitt.com/uploads/1/3/0/3/130323929/togidamuval-xipopumese-gadinedirelibi-pifoguxibori.pdf
    • http://seattleatheists.net/uploads/1/3/0/5/130542909/misepalekunedipimo.pdf
    • http://jaguartracks.com/uploads/1/3/0/4/130475923/fonofabojiz.pdf
    • http://empowerchicago.com/uploads/1/3/0/3/130313272/nirulilukiralaz_luvezaje.pdf
    • http://chairact.com/uploads/1/3/0/8/130874416/224a60c3c5.pdf
    • http://pfarts.com/uploads/1/3/0/3/130323175/fizum.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_off0000784f.bin
c5df0ff717333e6c2f4a017f3093cef0b3d45ea9f0e0c16ce1e0d3b10fac80e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 7992 bytes

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