Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb5c045aabbc0e2…

MALICIOUS

PDF

88.9 KB Created: 2021-06-29 00:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e06663e5e4ca30dc2f3bcdcb16118e80 SHA-1: 54acb07ae6dff7931309830b85d0781bf5dcdb96 SHA-256: ceb5c045aabbc0e2d87c2a9f1c69f25816ede6e41392e302b7525490146c4306
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories on various websites, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a002b4c49c---2228039801.pdf
    • http://airfa.it/userfiles/file/17601195833.pdf
    • http://firmykominkowe.pl/Obrazki/edytor/file/lolebixasep.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608881b4919b4---89913951411.pdf
    • https://eravukappalpalli.com/userfiles/file/nifigenolanabeg.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942468e4d8a---82934612937.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f93271bf2689c745f096675b424d71ff/34906031257.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b55eee92b33---41852369724.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd53c069f70955c03895b603dca674b8/bugunev.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/bk0571cviovmike2h4ni3h58ou/42687659826.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9a6ba1673---zerulinik.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/46340042612.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/841ddc09cd569e4ddff3212933c50dbd/busix.pdf
    • https://sindonis.com/userfiles/file/13679036327.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/zutijedofugoxirozalam.pdf
    • https://cailux.lu/userfiles/files/xonuronurobabodivola.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d29716744f9---9041170693.pdf
    • http://shadesvalleymounties1969.com/clients/868959/File/56322242262.pdf
    • http://adacu.org/userfiles/file/20210621025747.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716979d3380---60957570482.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1e409725c---79812437199.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85cb6bc13---govolimotopin.pdf
    • http://dambi.pl/userfiles/file/53499112508.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/e8c62ec851c5194658bbfa8fb01869d0/vivititikufezowuf.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=hill+hold+control+automatic+transmission
    • 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_off0000fa13.bin
8835921d36e74ae6b2d50b3927e7250ca1b7120ff17ea407d6fdbf3fc140f80c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 10596 bytes
font_01_sfnt_off000111f6.bin
d067cb6807357a58fdba71483d09c30d038db16366ed1362c3cbbbb7fac837b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F6 16344 bytes
font_02_sfnt_off00013c2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2C 16792 bytes