Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcb82f5b9580b9c…

MALICIOUS

PDF

91.8 KB Created: 2021-07-02 12:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8328cace2a321bd18f69b0776e3a925 SHA-1: 5206c98f9dee0433c4ff10a859916bbad2a75e7e SHA-256: 0dcb82f5b9580b9cac05c3513ce8159fb2776fb370476c478408d179de4ac1c0
196 Risk Score

Malware Insights

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

The sample was identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The document body is heavily obfuscated, but the heuristics strongly indicate a phishing or fraud lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1752c5878---67726251831.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b54e11b40---lifutulajavili.pdf
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/1656867119.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c570aa57f---ledetemu.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/irml5qhsf3us3batse7o9ov4o4/girax.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf80ad14c8---93728488049.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d6b96eba1992e8692891192592503556/31369542470.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9545617f3---36296909140.pdf
    • http://eprdel.cz/userfiles/file/pezonekomabataxixinoziv.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8426cb46a---91516275052.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/d6705d1164ae77127d4f38554907b804/gigofiwozikazokuva.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/a863e557a163dd3c111d0334dbab8d6e/pazebomadajoza.pdf
    • http://www.biotanika.pl/upload/file/99295740867.pdf
    • https://ludifrance.fr/userfiles/file/mutuzakuwi.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160761447d9de1---45160586481.pdf
    • https://cevhertemizlik.com/userfiles/files/59050298692.pdf
    • http://armanetti.com/images/pugozavazefunaw.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a44a189ab39---51429916925.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a412286e79e---xexolufigodegusotij.pdf
    • http://safarang.com/basefile/files/sosutibuma.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/dbgr0qf1bkloftvc6qf7qrhao8/bisimuruzovepetipen.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/p3phi1bmbpiaa7btb88853d1i5/tonazutepenobag.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6bc37766f---30121589501.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acec7840f8c---pegujajuxusuritenawixiz.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5f5358ebc---48902965531.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=objectives+of+auditing
    • 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_off00010325.bin
dd3ef86fde88d9ae329982dc62114a605db95d896e787eef607593f7b25c534d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 10968 bytes
font_01_sfnt_off00011c90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 16792 bytes
font_02_sfnt_off000134a2.bin
8ef33b0eac7f7612c96b835a8e6a2f21d1a994ad1945435d77cb34588b69ad88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134A2 17660 bytes

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