Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abb58d627fe71c1…

MALICIOUS

PDF

79.2 KB Created: 2021-09-01 11:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 48a8ebd306a983002048c7d260883125 SHA-1: 9af74329a3620296b6935ddbe7e819aeba57589b SHA-256: 2abb58d627fe71c131e34ba0713dab841291b168e1be0ae40e29f9e18a41b480
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farm characteristics strongly indicates a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/73rd14lb9i6s54ptjnabmva2q0/77334377119.pdf In PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/7j5ucbj2mos79kv58s60qfa4lm/dorobozajimazaxalab.pdfIn PDF document text
    • https://windsbs.biz/files/file/renaje.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160876d69360a3---xuxazomilifomalulavup.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7f03d6916c1c4c0df38232e236b58f6c/51039672049.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/06f77956230690e80efe0bb23edc3e87/19361230836.pdfIn PDF document text
    • https://makenie.com/upload/files/22764202691.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b24c1abf3---kumokasunadakonu.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/2aba56056a96b93b94bd5f53d0234a61/67116323810.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098748cc1487---kekasi.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/86790037667.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d192e31b0df0985a890f344b4fd89cb9/kevudukogepiwozu.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/kewiviz.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/1jbko6g0h7hd1qc685gq42se95/85224002673.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/27fb4b7e7e1b32f245d52a55047c3f2c/31506779008.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/0g4gf0q7ppe4bkbqrmji9pi692/wonimesadap.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f7660e0b940---50776322244.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/jarawadozidanitabewowegar.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/832c7ce2b3048b5c49669167f3146853/63985737659.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c782e2bacd---5290439337.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/gubetokofedoxodozegisonar.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/jakewibuzodigopamejiv.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0e440af6b---sowekuretuwiwod.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/butavowalarivaxa.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a584a736bb5---45900487623.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/odl5coi3ou1devllm2nujjvch0/levufilun.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/34f94a839d0ab49a54f7be31776d83b4/93024436626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=color+worksheet+answersPDF 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_off0000d1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C5 17540 bytes
SHA-256: 5c12dee8aa9efd5ca9e69fd4a3c544d00f1c05b5ff2d593803e54e9333271aa5
font_01_sfnt_off0000ff2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11741 10324 bytes
SHA-256: 620e3c95638aed40c963bef7cac6aea2f9a7cefd2370643fd11a828d2e91203d

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