Malicious PDF — malware analysis report

Static analysis result for SHA-256 70201b6a4a39081e…

MALICIOUS

PDF

84.5 KB Created: 2021-07-14 00:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1b4a7ea75ddb4304be98a51250f8664c SHA-1: c6fc0a01773d06e83ab8e4a4b5632bffda2d21d8 SHA-256: 70201b6a4a39081e130a3ee390c2b0d0cd8c5521005b5de197b5f49206e2a5d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and link farms, suggesting an attempt to redirect users to malicious sites. The PDF's structure and embedded URLs indicate a phishing lure, likely disguised as a lease form, to trick users into visiting potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://queure.ru/uplcv?utm_term=california+residential+lease+form+pdf PDF link annotation
    • http://juha.be/_files/file/14155832173.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/50079881685.pdfIn PDF document text
    • http://teraval.cz/res/file/71520148486.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073c43547970---7550531561.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5af871ec56---84069520816.pdfIn PDF document text
    • http://merwepizza.com/upload/file/51779405270.pdfIn PDF document text
    • http://cmtsport.com/pliki/26513151448.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/gufomed.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/zerosafenosag.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/27ad45f6b7fc7d748da9e10b6d676c1b/foloja.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///75367164110.pdfIn PDF document text
    • https://samowar.me/upload/file/makolitibamupip.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/795f7600a520aef1f07fdb704f004f36/55022432409.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/lotirefekasuvunebavegadin.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0e96630f---rotaradagilelajidebi.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608de3057e69d---58199766636.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/xuvalat.pdfIn PDF document text
    • http://sciattella.net/images/file/39289116282.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a123e5a131a---kudosawovebi.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/kkqpduj1ah3gqq6bpn6fbe8756/fisujojiraguw.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210613_044413.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9f5acd2e7---13006132847.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/jomusuluruwud.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 10692 bytes
SHA-256: 0737085eafad6d46ec160df10bb3a8e12e31f5dba7ed239007bb1e434ae03bfa
font_02_sfnt_off00011686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11686 17436 bytes
SHA-256: d9c8bb25be6131ce002a26d94c15d59f5a4ec70ad255e164a7a4dcadeed7c249

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