Malicious PDF — malware analysis report

Static analysis result for SHA-256 4879fadf2f13caa2…

MALICIOUS

PDF

44.7 KB Created: 2020-03-14 14:19:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c27dea7e4065dfe1d8500d9e3c3ef975 SHA-1: c47066c497649b4bc7cc323c8db17ac5ce3733b6 SHA-256: 4879fadf2f13caa259446ccfd1811ef1dfe2c38f55d7ed9dceb701200832242d
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on various domains. This behavior is indicative of a link farm or SEO poisoning attack, designed to drive traffic to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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://fly5c.bpmtc.com/uploads/1/3/0/5/130551013/130551013.html#projected+balance+sheet+template+excel
    • http://oliveraconst.com/uploads/1/3/0/2/130288510/fafajotufidavoboj.pdf
    • http://sunnyheightsretrievers.com/uploads/1/3/0/2/130288637/154843f0e70.pdf
    • http://strategic-divorce.com/uploads/1/3/0/4/130488199/vumosu-basewuxefawipu-vubajemulanave-vutosupigiza.pdf
    • http://bestbridalpricesri.com/uploads/1/3/0/3/130313148/lubepebaj.pdf
    • http://babyak.net/uploads/1/3/0/8/130813497/deferumot.pdf
    • http://mikewilliamsmusicclasses.com/uploads/1/3/0/5/130539583/mibekemawisajevu.pdf
    • http://www.painstresstherapy.com/uploads/1/3/0/6/130620937/dedusuledad.pdf
    • http://richmondnonsense.com/uploads/1/3/0/3/130379292/pexowovitafuzuz_xudoxoji_xelal_nugobumopirew.pdf
    • http://www.thepaintersperspective.com/uploads/1/3/0/5/130588928/ad0696.pdf
    • http://pvbcommunications.com/uploads/1/3/0/5/130544131/jawuw-zasawo-wanafu.pdf
    • http://www.fizzgram.com/uploads/1/3/0/7/130739303/821ccc2.pdf
    • http://www.twgtrips.com/uploads/1/3/0/7/130740618/1917630.pdf
    • http://skandinaviskgolfgruepppe.com/uploads/1/3/0/6/130604153/755514.pdf
    • http://myskinfit.com/uploads/1/3/0/7/130776605/tuvovogu_sunovixiz.pdf
    • http://enchantedplayhouse.net/uploads/1/3/0/6/130605269/7b237883.pdf
    • http://flamenart.com/uploads/1/3/0/6/130604210/0bd7a8a5fcaaa.pdf
    • http://warriorsdmv.org/uploads/1/3/0/4/130483346/e1b70c0aab69a8.pdf
    • http://5thwoman.com/uploads/1/3/0/5/130589435/waresomo_jeresuxilomaba_lakidurapifo_sowejebolejejuv.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_off0000852f.bin
c6e0387c9617ecb1551233ec61afeb355b66af83210c937dbad971d15bfcb0bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x852F 8460 bytes

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