Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29b28833e31559d…

MALICIOUS

PDF

85.3 KB Created: 2021-08-23 15:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 941ac3bb3439077605ba017ec3dad441 SHA-1: aaa185e2a9b7854b2f437791bdfc7655357393de SHA-256: b29b28833e31559d43f362cf82655869e2971e5a12e56399d47adc388294647a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to lure users into phishing scams or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=wilches+ready+mix PDF link annotation
    • http://tcihk.com/userfiles/vakorinogapujafasaja.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/gufabowefikidezafisoxu.pdfIn PDF document text
    • https://isosklo.cz./uploads/74831823606.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/78cff73cda1f2b84581f80fbea24989f/satenufunirumasilifotek.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16079680806b18---patekuzik.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2d218403e---49174850050.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/8875658746.pdfIn PDF document text
    • http://888chji.com/userfiles/files/58508236525.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082394b2bc85---71962136830.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160baae2f034fa---44894764710.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/7267993213.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2e790d58---95893913748.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/60388755734.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f1a125e02a6---wasemefavelavi.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3733b17a---mexipujamulotataxuti.pdfIn PDF document text
    • http://belloverde.net/emailer/file/kibufenejuxalozu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d1464a04b533e75901fec2da514f330a/15409225830.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/18754726541.pdfIn PDF document text
    • http://ontsgoi.shop/uploads/files/lurix.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/tevapifogog.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/xijudeb.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/5b05f1633ea8c04eb8b6acb758de9c05/18693440185.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/nisoteje.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078b438bdbe8---66804471985.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_off0000e91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91D 10520 bytes
SHA-256: d29233609d92ee54b03696dbda98fd66ae69b7db5f4c4daa7f725bd4d28c2b53
font_01_sfnt_off0001010c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010C 17724 bytes
SHA-256: bdafb44633506ec26cbdb9f8190822416cc594125067e963a8a8793aace7efb4
font_02_sfnt_off00012fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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