Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c154577818f3b56…

MALICIOUS

PDF

95.1 KB Created: 2021-07-04 05:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 363398cc24448c96bf546a842a4a2122 SHA-1: c882ba0771595f3428f0c87be6c2e4c26093cc04 SHA-256: 2c154577818f3b5614beaca087ba00df70f07fde34de45aef88d380e846c5358
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware. The file's structure and the nature of the embedded links suggest it is part of a broader campaign to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://nomylo.ru/uplcv?utm_term=bipartisan+meaning+in+tamil PDF link annotation
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/9tnot2muph9i3kppbn3o1nr7na/37439880584.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/88665908632.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d8657a7c3bc---fobimagotazituzamilite.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/66650014285.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/rozarevazeboxisuxafo.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/tolexijozusowupugejevuj.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/853a9503f5b00541e3c58bedc65bb8e9/61799437406.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/1de70b3576d481fe3d5ed7bc0a2742e8/fuzivedadimulotajot.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/8rb94nj3kg25a1118pesjigfu0/66721476525.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/d991436a9ad2d8b709f21108e16cedd4/24456972890.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/60460111230.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/subugenana.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/sedunaxafuniwosaxamot.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a32f7653baf---98387217650.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/nuduguwu.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091d818a3a2b---85167070262.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/gorijerinag.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/8b488bjpofgqeu8t5jd4j7d1bg/78471695988.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/37093019027.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/92603656316.pdfIn PDF document text
    • https://carlojans.com/cms/file/37351647855.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/51373944833.pdfIn PDF document text
    • http://mamsongdamchoi.com/images/chua-phan-loai/files/zazis.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/da1ls9qt99spkr2hjqp9j2i6mv/9666291996.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/dcf3db6ce96d82152171eaeee21cdcfc/65012793636.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 22284 bytes
SHA-256: 06175517c8c2d1af4858a2f25159dbe6c600c8d1883b9178dbfa6c35d27b1297
font_01_sfnt_off00011a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A63 2392 bytes
SHA-256: 12be22d56a8ef60bb82e0765b1833e428e893a8077ce6da5b6b014ac8c476e76
font_02_sfnt_off000124dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DC 16660 bytes
SHA-256: 2eb02cbda945387aaa713ac1ff07aef2e3e3402ae62f23b236d167ffe39ebc29
font_03_sfnt_off00013c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C68 10528 bytes
SHA-256: e140d18b311bf8e02f2a529d946b5e28fd874d2016719c7fefaca95be56798a5
font_04_sfnt_off00015460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15460 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.