Malicious PDF — malware analysis report

Static analysis result for SHA-256 00749f6a0c690775…

MALICIOUS

PDF

82.6 KB Created: 2021-09-06 03:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4a952dd56473247e1b596fdca13cebc4 SHA-1: f4e3ff0872a60ae64e5607a6841013ed51060c9e SHA-256: 00749f6a0c690775547a4ec7d25def5b29416c6a305472b172f592bb01a85f0f
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting, consistent with a link farm used for phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ikitellirezistans.com/upload/files/48195265869.pdf In PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb7661d04---sanosikopunu.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610346558a249---84963573012.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/81363463958.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081088724ae4---fezetojovakivulaxavu.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/0be5ab7a9be4f75e8322580a556b231a/84111515108.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/35265240102.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/c3b0f0f92bf4a1027267d27f85f166d4/vigepeterabufumunod.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5789560393.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af69a93fe70---57664524980.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/43038241707.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/38736690384.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/73ee38fb53f1555cd125fe1a298b4e95/972864421.pdfIn PDF document text
    • http://babamoleskine.com/files/file/mozinitexunuxutotisijar.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/noxutawe.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/sapupudaretoxukex.pdfIn PDF document text
    • http://yanartekstil.com/firma/files/53670574417.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160838c5b33f6f---24713431284.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/difojexufipe.pdfIn PDF document text
    • https://isosklo.cz/uploads/sesakumumifajasiwijoriko.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4b6bc3d21---44200651271.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e8efc0dcb---badawerivinodamidi.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/62099611614.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=pdf417+barcode+font+and+encoderPDF 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_off0000dcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 10484 bytes
SHA-256: cdaced0ddb359899db95442c9d52a4856ecab8770c4ddf6f4097b6ef61324b2b
font_01_sfnt_off0000f4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CB 18164 bytes
SHA-256: eac1af0b0815b6f3846c5d8d849ffb6fbd846fa097f70db33728f09cf65f84e4
font_02_sfnt_off00012488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12488 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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