Malicious PDF — malware analysis report

Static analysis result for SHA-256 749c1be9bc24f6d6…

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 22:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf414d7fae3fa3143acadabe4d534dff SHA-1: ab5efa772c2c96466d74ea728898198e0a3d2cc8 SHA-256: 749c1be9bc24f6d6707f0e5a303b14a61b4e8aef6988509d40c08cca58da2f7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure suggests it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/cef3c7c017367e2e9cc11121428329d2/sofebovugorugoxepaludugi.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9a80eb557---59142289265.pdf
    • http://allmedicus.com/userfiles/file/vajegakaludepedemexalam.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/trj84vc41jmik5057dv989khj2/89394430285.pdf
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/tovamobegapejulanafijene.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beafde1988f---1915817311.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d252958dd1---66225659404.pdf
    • http://asiadomainstore.com/userfiles/file/rorikimokum.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c73c8b0686---dumajakafatibemasuw.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e32585836e6073483e8039861d05cede/kotejotexusigo.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6n9ngc7u8lupfshg00lo9l3ji4/63814442558.pdf
    • http://fipjp.com/userfiles/file/86712463645.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/rolf98dkj574dkidaifbc6qh51/46364050157.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/856b1458e8bebbbc029fe222807c217e/6954035217.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869f809b5a3---riragokewamoke.pdf
    • http://www.aqsclimited.com/EditorImages/file/zubupifipagaxaxej.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a435d2d2dc9---29509986291.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/tuchvh18nhn65426goorjfuju6/xevovevifepusul.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca303ae94a---buwotikukikulena.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608383205202c---gozobutebadamudel.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079d8c1d8068---88400324485.pdf
    • http://eros-arena-reutlingen.de/eros/userfiles/file/55659712263.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/dslbnl96l8jdvod5pg0d1bm3dq/jokudeto.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=blinking+of+right+eye+in+male+indicates
    • 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_off0000ee37.bin
e8a1e45b59eb0608945463c6fe82bc9640dd3cb6883b984a605c7a8ea8f9d473		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 16704 bytes
font_01_sfnt_off0001197d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1197D 16792 bytes
font_02_sfnt_off00013194.bin
f1ba7e31b96f6079fcba87d7ece397bd11faf5848e285ac8acd7373418b3d4f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13194 11184 bytes

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