Malicious PDF — malware analysis report

Static analysis result for SHA-256 9139e870017104dd…

MALICIOUS

PDF

85.9 KB Created: 2021-07-06 16:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09865a56cb0fe02d9e484933e4935102 SHA-1: 7201b0f9f65af8d797ae5d49344516f63febcbb1 SHA-256: 9139e870017104dd7ae211450e50acbcc914190ebd9db6c5d6e08f4ea3a61cfb
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains. This behavior is characteristic of a link farm designed to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://airshow-bg.com/file/76736607066.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/eivk2phhumv0i9ij5honri8c10/diwusedarejuxefibit.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/319ab1332ecbbef1efb2400d7aad07c8/kujixatodosatenuzo.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094741a80265---xumozugipanugi.pdf
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/68996193387.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/df3e186104fd61edf751e269fa420147/togarokasokafivewofekixam.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3243be6df---maromegugosugopovidigu.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/0ed79d2eb5ca3d257514d70c51b9b420/gapufafexeli.pdf
    • http://runo34.ru/attachments/file/72403457319.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/f64c2ed282739f13e271f5fa8544a9d2/77371496847.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21e9b7c7b---77443404677.pdf
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/votiluromituponesakisoge.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607252e6319d8---guxevigejujegapuxu.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/fo142l1ksfq4lbkauskjco5k81/49734059131.pdf
    • http://dhf-china.com/d/files/55123665788.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/i6rloqi65jh7k45pabvelgeqk4/86421397273.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/205dc8b17d96cb57ff298649b7c93abf/68828135485.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcb5ece0cc---dugejajigetamesavim.pdf
    • http://karate-talence.com/newsite/userfiles/files/5455762112.pdf
    • https://gizaviation.com/uploads/files/xakefu.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8cf129494---xikiligim.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6693fb7d2c108c9daa0f92f05cf9135f/rukilawurevejaweritovaz.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5aa29580d---dokebenoxejonasol.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b49f011669---15187717833.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b271ee596d2---95058695128.pdf
    • https://mk-promotions.com/ckfinder/userfiles/files/vegojinen.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=different+types+of+candlestick+patterns+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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd4.bin
5bf3d29bcefad980bd0de945dd5abbd85b6b30f9b517ca2472982870a12c046e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 17224 bytes
font_01_sfnt_off000118c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C5 16792 bytes
font_02_sfnt_off000130dc.bin
9b5c10ce1dc9f7fb974b8ff3231fc3619cfca4ed0c88d5eb679bc85ed538d7cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x130DC 10820 bytes