Malicious PDF — malware analysis report

Static analysis result for SHA-256 964ecf6381e3942f…

MALICIOUS

PDF

38.0 KB Created: 2020-03-29 06:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f93cead63b691a8cd1395799f81243a0 SHA-1: 9904cb1c6db2178804304575ba2cc4070552fa42 SHA-256: 964ecf6381e3942f2326adcdadbbc536e6951b416a2ba4b6e75fe47fc44e7ec8
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO manipulation tactic, likely intended to host malicious content or redirect users to phishing sites. The ML classifier strongly supports the malicious nature of this PDF.

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://74-123-76-197.mgwnet.com/uploads/1/3/0/4/130483993/130483993.html#como+elaborar+un+proyecto+de+investigacion+pdf
    • http://parentsonduty.org/uploads/1/3/0/3/130323453/vixit.pdf
    • http://liferezonates.com/uploads/1/3/0/2/130288430/3342284.pdf
    • http://taideinto.com/uploads/1/3/0/7/130775645/882a511071deacd.pdf
    • http://ghastlymonstrosities.com/uploads/1/3/0/2/130287537/siwireg.pdf
    • http://www.marlertowing.com/uploads/1/3/0/8/130874614/6662687.pdf
    • http://emilypbarker.com/uploads/1/3/1/3/131379641/pubejad.pdf
    • http://leadthewaypetservices.com/uploads/1/3/0/7/130740026/1344970.pdf
    • http://readingsbyannie.com/uploads/1/3/0/7/130740129/kumejimoputuwejuwi.pdf
    • http://appletld.com/uploads/1/3/0/6/130640029/7b43f058558e70.pdf
    • http://www.millennialbarbers.com/uploads/1/3/0/6/130620958/9360924.pdf
    • http://cairnsmensbreaky.com/uploads/1/3/0/9/130969166/xosuvenerusifaluv.pdf
    • http://hostmaster.house4pleasure.nl/uploads/1/3/0/4/130483086/mapapatazijalu.pdf
    • http://williamhalestudios.com/uploads/1/3/0/5/130544009/fojunarolezuma_vikajopebo.pdf
    • http://photographybyrausa.com/uploads/1/3/0/7/130740124/gogorajoguseviwuri.pdf
    • http://cvfornewzealand.com/uploads/1/3/1/1/131163897/xazupibumitipub_patagixixaxufok_tuvibetonawe.pdf
    • http://metlifelostpensions.com/uploads/1/3/0/5/130546000/fopilipad-dimudar.pdf
    • http://cdapaintlessdentrepair.com/uploads/1/3/0/2/130287862/mufazupe.pdf
    • http://texascounselingandrehabilitationservices.com/uploads/1/3/0/4/130483322/6304887.pdf
    • http://hostmaster.kvsys.de/uploads/1/3/1/0/131071253/8538864.pdf
    • http://mysticwolf.rocks/uploads/1/3/0/5/130590208/213501d33b1fae1.pdf
    • http://hello-baby-toys.com/uploads/1/3/0/5/130538986/toditun.pdf
    • http://gretcheneveretthardwareandhome.com/uploads/1/3/0/2/130289799/5ec9273c.pdf
    • http://mrsdunlapsscs.org/uploads/1/3/0/3/130379246/3b946a7e6f.pdf
    • http://masonrystonework.com/uploads/1/3/0/8/130874031/wafitubevaw-gokowubo-tunamilefitidit-mibupirovo.pdf
    • http://mrsdunlapsscs.org/uploads/1/3/0/3/130379246/3
    • 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_off00006902.bin
870f909336794be8255914aee3c6da17a700aa583f33996ddc0d822dbf2397e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 8508 bytes

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