Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01d0a13fd4f241f…

MALICIOUS

PDF

93.6 KB Created: 2021-09-04 21:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 28f4c1f1e223eee174307724d6dee77f SHA-1: 1ecf1608f1a098ca19e267207bcf9aab8c88c43b SHA-256: d01d0a13fd4f241f08727b6033ddc1affacae01fc78869abb13635b843a709bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF containing numerous external links, many of which point to compromised websites or domains flagged as disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. The presence of external links suggests an attempt to redirect users to malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://a-b-i-s.net/layout/bilder/file/30814014842.pdf In PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/69576244472.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085de041ec90---wowom.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611514879c903---83366739350.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/b692175c12941a0b431faaa7c91ae1f6/sixoragolaxidafuzive.pdfIn PDF document text
    • https://jetaime-shop.com/files/xudugoburogezilu.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/cc65c7f843c218b48d88e3d9d83ba965/92176238685.pdfIn PDF document text
    • http://chinahongji.com/d/files/lopaxanoruvuvifokud.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/dubonusu.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/88689374752.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071aef1855e0---27178546494.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/jevexopoxutovo.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08bc9eef62---rizunitimosakujiw.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/8fb57446b764d5a82d3b5c2e98099acb/79555562603.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/jolizotejudegowobelipam.pdfIn PDF document text
    • http://poorclarescork.ie/images/79064681029.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/wepumibumoliv.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/b90319a08026500c8ee9f4ff0970a708/79528805128.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c444b5c77f8---1741297618.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f2726d93ad14e9393ac372666e6a3709/33388180374.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/37524100290.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/dba9ee0b5325d0a4cf93bae286f1b2ac/jusajijalomexeniritememuz.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f58876e04c5---zapovude.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/24460206492.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079873022d1e---27876730682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=lagged+pipe+apparatus+manualPDF link annotation
    • 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_off00010a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2A 10672 bytes
SHA-256: f4c7c3c723a7af435cbf5f85d19277b15b1a204ee6e4c157081ea837fd7094e1
font_01_sfnt_off0001225e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A70 17668 bytes
SHA-256: 2d24217d2a9d3aadc09344491bbedad70b64a37eb9a198d18a443a41bb4ccf63

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