Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf5767bd8c546da…

MALICIOUS

PDF

40.8 KB Created: 2020-05-21 09:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9622df05e39bbe514de9c0216a7482de SHA-1: c48d750bdf7f4a89d67299fdaa1103a2ea3652f5 SHA-256: 5cf5767bd8c546da6da114e9ba5eed7620bbe3c2ee3bf70fb893af9ccadac1f1
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to a wide array of external PDF resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://healermen.com/uploads/1/3/0/6/130621709/130621709.html#independencia+de+mexico+causas+externas
    • http://beautyonbeat.com/uploads/1/3/0/6/130620729/vikojitipoper.pdf
    • http://fjlclothesaccessories.com/uploads/1/3/1/3/131382113/kefirujuwil.pdf
    • http://thehealthcare247.com/uploads/1/3/1/4/131453713/bunavujasofiladuse.pdf
    • http://rooseveltgirlsbasketball.com/uploads/1/3/1/6/131637527/c527c4.pdf
    • http://kikodavis.com/uploads/1/3/0/5/130588417/3542692.pdf
    • http://h1ride.com/uploads/1/3/0/7/130739445/zoroj.pdf
    • http://absolutedoulacare.com/uploads/1/3/0/4/130483198/363a8bcdabde0.pdf
    • http://unalomesoapscandles.net/uploads/1/3/1/4/131409158/dewujukep.pdf
    • http://casasouthlight.com/uploads/1/3/0/2/130292007/d41f79cb50.pdf
    • http://myforgoodnesscakes.org/uploads/1/3/0/9/130969144/mipaga.pdf
    • http://dobiehills.com/uploads/1/3/1/3/131379268/87a3d2470b587.pdf
    • http://pinkisnotmycolou.com/uploads/1/3/0/2/130272415/fikajojexurunonoroke.pdf
    • http://serenity-medspa.com/uploads/1/3/0/7/130740490/rebisi_vimatiborapeg_selaledizen_texukuzelineped.pdf
    • http://smrestoreutah.com/uploads/1/3/0/5/130551066/jezex_kafatag_mazaxemevefi.pdf
    • http://harrimanpaige.com/uploads/1/3/1/6/131606365/f1ed8cd9.pdf
    • http://itsgraafaerospacecorp.com/uploads/1/3/0/7/130776325/denuxawikozid_tewefivasesenuv_fusupex_wegixe.pdf
    • http://crownofgloryshop.com/uploads/1/3/0/5/130590550/db87081b5.pdf
    • http://coldbunny.com/uploads/1/3/0/6/130603976/gomatefubef-gowaximujosave-zoradowojiden.pdf
    • http://pluckylearner.com/uploads/1/3/0/3/130323339/belivosuguxa_movipakadewipo_buduxunobadiw_wikutotugu.pdf
    • http://butlikehearmeout.com/uploads/1/3/0/2/130289304/mutexa-zuwuvajizixufu-rizebiwetinuwa.pdf
    • http://abckytejahutusventilatsioon.ee/uploads/1/3/0/8/130874018/248351b9389.pdf
    • http://lonestardbc.org/uploads/1/3/0/3/130323403/jiliwobuviwe-fepove.pdf
    • http://arttexaschurch.org/uploads/1/3/1/0/131071298/13786.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715e.bin
23aa92ccccd69a8aba20c174dfca62b1ff7085a1ecff652743397851aa17ede3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715E 11128 bytes

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