Malicious PDF — malware analysis report

Static analysis result for SHA-256 754024276417d08f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-03 12:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 74060d914c204cecf947d38bc80ee353 SHA-1: 331580192499398445ddc2040b1535605e5df2eb SHA-256: 754024276417d08fe01e451840ecef0157b0f38a726c15a3ce56d03068b4abc8
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple URLs, many of which are hosted on compromised WordPress sites. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as phishing or a trojan. The presence of numerous links suggests an attempt to lure users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911eca8d027---waxonur.pdf In PDF document text
    • http://thucancakoihikari.com/luutru/files/62169379867.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/monizupi.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/nerobiratofaxezugolaguj.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/biniwuzutibilonet.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/68680076056.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7a6e8beec---34845017056.pdfIn PDF document text
    • http://candientushinko.com/images/file/30965270123.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/vukuvupikefan.pdfIn PDF document text
    • https://cristalensi.com/public/File/28702363355.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/komorewekikajukonilom.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/jevikedidifar.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/tazezukabuzemeke.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/fewejesalakabikezejobawod.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/25710647618.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/45463530124.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/mt912uth6npeu0ceehclmt789n/70417218826.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/4ccb8bc1c2d0287698fc6ef7998b1127/xokepekakojelobetodejav.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ca3763160---84459609198.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/xelabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=guesstimation+pdf+free+downloadPDF link annotation
    • https://mediaget.com/userfiles/files/dexedememubi.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_off0000d0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A7 10884 bytes
SHA-256: e7926214e918a466e49362e5824580e50251d6153ba907c8d2d2cad1b918b265
font_01_sfnt_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 17976 bytes
SHA-256: e9daaf1feecc4d6d735af063b81d61d3b73c28f1dcfafd282195b58f2e2b0c92
font_02_sfnt_off0001186e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1