Malicious PDF — malware analysis report

Static analysis result for SHA-256 0716f334f9ee19d8…

MALICIOUS

PDF

71.5 KB Created: 2021-09-02 12:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 421f63a6a5943810f7a4106756a17aac SHA-1: b619564059488a127baaa155f4f999a725823694 SHA-256: 0716f334f9ee19d89e1ef57f5cda1dfa862a3d667d91207153ae832e7ff48eb8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, designed to redirect users to potentially harmful content. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 http://dorp.pl/userfiles/files/76512394479.pdf In PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/p455der1o1iobv960j44cml50m/28746557306.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/37603143672.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/zemupodemo.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/jifaxinetaz.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608048c76ef72---redudini.pdfIn PDF document text
    • https://agros.net/uploads/file/zabuxel.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085846f631e6---65168151341.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/64035662434.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/56182369268.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/35179413625.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/45092928671.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/3336113878.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/53872398573.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/67234331814.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/3f1456c40fe105fa31db24b6953a5aba/3264485312.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/kogezojikitevatuwadi.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16091fd6c6b756---dujalakexax.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/95411427142.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd8ce4d7be---tapewiferiwexur.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/wefususufif.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d2b1d9b9fae52322f0b060b3eb7bdb06/79636376697.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/gotamanufipi.pdfIn PDF document text
    • http://amdind.com/userfiles/file/bopefodibojilanixewefisi.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/3v6orev0pvjbqna9d7449ea945/31724552083.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/30169942056.pdfIn PDF document text
    • https://ubitanduk.com/contents//files/59169140477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=greek+english+new+testament+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_off0000b6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AC 11040 bytes
SHA-256: 44f9ca0603d28c461c56de27d3616d6008cc91d2cc850ae0c19572d69551a3b7
font_01_sfnt_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81A 15720 bytes
SHA-256: 0dbc065bbaa979e4a47391c1179bca2765721620a6a9ffbc2776ec4ac4329814

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