Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc770633db7de17…

MALICIOUS

PDF

93.9 KB Created: 2021-09-03 11:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3cec632d4e7e0eddbfe327a35b05640f SHA-1: 2567e18b777201efb03b9468a377acbbad734392 SHA-256: bfc770633db7de1764b552b1bc8f74fb6fcdefc01a8765d3b2ff2c6bf5c1550d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94315117787.pdf In PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160948475508e8---18651476761.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/disebipoxojideveba.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607e487fcfdb1---guzidivida.pdfIn PDF document text
    • http://palami.by/images/file/difamilas.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/967940302.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/45619687380.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/59445180005.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/54907259439.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8596fc13d1---30048438128.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/21582136031.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/40707129203.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/140fa8e78e4da12f3fb0a65829dee7ea/sikuruvajetozituduxa.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/talidititebize.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b65930955db---wodowivopevarofapeta.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/lomidasawu.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4e3bb322bb81dd878290c7c942c13bc0/tirurone.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/kabetovomo.pdfIn PDF document text
    • http://hhsbluebirds1967.com/clients/b/b5/b592d679e9980e62d9d56be1bfb8b6b6/File/rinodilazun.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/vikigewig.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083057d1f48e---84441160950.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/a9282b84ebd095a54676aac57b98c06d/58114930599.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/baab399e4f2afebb83558a7ff4c7e3df/dopowabuluxesunamodaza.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/facbe452519f0ff33908e16590050db5/943583745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=freud+dictionary+of+psychoanalysis+pdfPDF 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_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2D 10908 bytes
SHA-256: 09a4bf4521cf6cf5615ccaa2a9be95b6cca76b419b1a2c426182bea472387467
font_02_sfnt_off00013755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13755 19240 bytes
SHA-256: cce31dc407167a112e2ed9f3c6325ae13c953fb1c5777fc81e4b94f1922c0177

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