Malicious PDF — malware analysis report

Static analysis result for SHA-256 b974f650028a03b1…

MALICIOUS

PDF

83.0 KB Created: 2021-09-03 14:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2d460a61d0d09def80bd675f943e61e7 SHA-1: 0f7d3e9e62b2bf465d4f259a0f27cbe5e3be7592 SHA-256: b974f650028a03b1ff7d78be62640f9fcc14da4141305d3de50c35d3f479aa23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://turkihale.com/userfiles/file/pazasagiz.pdf In PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efebdfdbd14---5620084669.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/kojelozabunabukepa.pdfIn PDF document text
    • https://wecareprogram.org/images/file/73734800492.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/5562c56afaf8a6647e57ba7df350d21b/15742146471.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/63717870224.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/2b5c9e5b4c4df651c2c25f1cd5d5d8b1/74642507878.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a235740ddb---10103975150.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210702044533.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/87088240333.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/tobugofoxakorijaz.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/26440260005.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/8f8f300f95413967ffaab0bbe8c495cb/gitosafatetuwisej.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/2bb9cb74947f99286cef7cd4bcea4922/49689597445.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/11844446393.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/5532512656.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/2q2ct9hf116hmfl4rjtu6qggj4/pugavetidopijazewi.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608323f3e3dc2---41575183189.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/ac9dad75b5678c94823e94bd91af3d53/bevovekuva.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/80993007786.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/qf9d8rq420rt033ll6a14iipeq/xolebex.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/pixetegupogevot.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/sitisogitowivuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=generac+22kw+70432+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_off0000de6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6D 17964 bytes
SHA-256: 8ba6798585266503408e7c741744cf2a1dc1bc0b06076ce2e2767a1a08264c5d
font_01_sfnt_off00010d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3B 10772 bytes
SHA-256: 18ed29f682c20652aedff7deefa7014ddcb37c2119ba2a6d8debf4eeeb11050c
font_02_sfnt_off0001264d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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