Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec1704a33a12209…

MALICIOUS

PDF

39.3 KB Created: 2020-04-01 17:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 931345c47565979b7afd350293d2e1b0 SHA-1: 3aaa3cf22f1f8ef3a6ffa6073d19f189f2c6c494 SHA-256: 5ec1704a33a12209b6963c45aadd47ddae635b6216b4dbe8dd59a36e73354805
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded URLs point to various domains, suggesting a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern appears to be SEO manipulation or hosting malicious content via numerous external links.

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://adventuresbyprice.com/uploads/1/3/0/5/130588396/130588396.html#full+metal+jacket+private+pyle+kills+drill+instructor
    • http://myfourleaf.com/uploads/1/3/1/0/131070334/4b7470224.pdf
    • http://actionapplianceinstallation.org/uploads/1/3/0/6/130604922/tipulofutizeb-dezabudobubop-paxodotideje-katumawixur.pdf
    • http://hairbyrochelleb.com/uploads/1/3/1/3/131381414/74fbbe4141fd3.pdf
    • http://suchesfarmersmarket.org/uploads/1/3/0/4/130490444/kososebeve.pdf
    • http://teresajonesonline.com/uploads/1/3/0/5/130590678/deleworiwinazixe.pdf
    • http://powerfulwomenofgod.org/uploads/1/3/0/3/130323835/jamibidi-zogivo.pdf
    • http://bethwagnerart.com/uploads/1/3/1/3/131380786/4556207.pdf
    • http://gvngoodglam.com/uploads/1/3/0/2/130287289/1068923.pdf
    • http://rrinfinitetransportllc.org/uploads/1/3/0/5/130590458/wiwovigokojelok.pdf
    • http://alwayscal.com/uploads/1/3/0/2/130270982/2022646.pdf
    • http://winterlandsports.com/uploads/1/3/0/3/130379581/947734fb90f.pdf
    • http://stayfrosty.co/uploads/1/3/0/7/130739214/eafe78d26dab.pdf
    • http://bluevalleylops.com/uploads/1/3/1/4/131407102/9121575.pdf
    • http://besafeqld.com/uploads/1/3/0/6/130639059/rikanami.pdf
    • http://studioshiuli.com/uploads/1/3/0/5/130590162/58e389c9921fc.pdf
    • http://dosdiablos.net/uploads/1/3/0/7/130739697/jawapagoja_ravalagu.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_off00006ffe.bin
27324e26a714e2013098c9ad7c9f6819436b206549c2abbca42c0dd11f74cd2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFE 8132 bytes

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