Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2b547e9e883cc6…

MALICIOUS

PDF

47.2 KB Created: 2020-03-23 02:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3d4eec60031c52013cadfe02a671f504 SHA-1: 6df7e13024b87917294da0e72d2b3eb4bf3088cf SHA-256: cb2b547e9e883cc6e7fc89c29ca57a6d84154a1a084790bcc6468c83fe358513
62 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO link farming to manipulate search engine rankings. The primary heuristic indicates a 'PDF_SEO_LINK_FARM' with 30 external PDF links, predominantly hosted on domains like 'ochinlearningforum.info'. The embedded URL 'http://scenefrapsrl.com/uploads/1/3/0/5/130540193/130540193.html#una+flor+o+fruto+con+i' also points to a similar structure. The document body is heavily obfuscated and appears to be generated content, further supporting the link farm hypothesis.

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://scenefrapsrl.com/uploads/1/3/0/5/130540193/130540193.html#una+flor+o+fruto+con+i
    • http://ochinlearningforum.info/uploads/1/3/0/5/130590592/jubebazepelixos.pdf
    • http://www.kdsupportnetwork.com/uploads/1/3/0/5/130589374/mabulotetafepa.pdf
    • http://samuelyusuf.com/uploads/1/3/0/6/130603753/2433063.pdf
    • http://www.titanmealpreps.com/uploads/1/3/0/8/130813887/nunukur-fivowusoloda-jerotifo.pdf
    • http://www.hannahruthdesign.com/uploads/1/3/0/7/130740000/wetevajonaxifazamoni.pdf
    • http://dctechltd.com/uploads/1/3/0/5/130544494/898c999b195da4.pdf
    • http://3e3.co.uk/uploads/1/3/0/4/130489226/c7de73fa.pdf
    • http://repairplumberfortworth.net/uploads/1/3/0/6/130605285/6e57f7.pdf
    • http://www.platinumservicegroup.org/uploads/1/3/0/6/130604110/b36003cf9b.pdf
    • http://rysandco.com/uploads/1/3/0/2/130289681/2457885.pdf
    • http://us.choice-wireless.com/uploads/1/3/0/2/130289161/ratogolotebijepipa.pdf
    • http://mollymooves.com/uploads/1/3/0/5/130590391/6615243.pdf
    • http://atlantapermaculture.com/uploads/1/3/0/4/130488328/tujilezenojokizi.pdf
    • http://entrepreneursotop.com/uploads/1/3/0/6/130639034/katoxufo-rewevu-ravurevokojifel-baduwugatos.pdf
    • http://www.wildwoodbiking.com/uploads/1/3/0/2/130287261/lugosutora.pdf
    • http://deonu.com/uploads/1/3/0/6/130604576/wutiwine_sorawapavivapa.pdf
    • http://mindlogger.info/uploads/1/3/0/5/130588784/pimir-rinosep.pdf
    • http://akcab.com/uploads/1/3/0/6/130621071/favamen.pdf
    • http://ashleyhorobin.com/uploads/1/3/0/7/130776571/nosat.pdf
    • http://www.ampcoreelectric.ca/uploads/1/3/0/6/130604476/7b36b4b.pdf
    • http://wallinba.com/uploads/1/3/0/2/130287896/461ac7bc992398.pdf
    • http://hairbyheirgroom.com/uploads/1/3/0/5/130550713/ragutafikex.pdf
    • http://www.hopediamondsministries.org/uploads/1/3/0/7/130739017/rutopole-laxigumenanu-miruso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000756a.bin
f8ecdad25a73f506ed2717de63037697f0bba235c9572279635cf126a3f1ca52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756A 9180 bytes
font_01_sfnt_off000096df.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96DF 2616 bytes
font_02_sfnt_off00009fe9.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE9 4144 bytes

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