Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fffa6d516922ef…

MALICIOUS

PDF

105.4 KB Created: 2021-06-26 06:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 32fcb5211380e71be5d060f5e91ed9a0 SHA-1: 2667af43382c4c853539a3a619fff23fa5572697 SHA-256: d6fffa6d516922ef9d3db622e1011cbea5d78f125b0c8d3d5aee82672ea75753
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://cructi.ru/uplcv?utm_term=the+secret+of+the+flower+of+life+pdf PDF link annotation
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/bf295e1b690f442293b6e453fb8a806c/gafajuvakebu.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077518e989ac---baratesonep.pdfIn PDF document text
    • http://df-2.de/images/daten/file/9809697338.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/60937282531.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/22ef3f7e0192a254e4221345dd8459fa/80492594425.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f5f751444ee7ad32806202b8084822ae/nalibepuxusadojoxijim.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/novulibapuzeme.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pv4cehq7uvr4mj7n4e7u9e06e1/senoporubek.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/44fa43f924c7d17593e26800ef5de440/mojidoxela.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609de49862372---wuxel.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/428f29f59bad20361c9ef2e555aefb44/sijajareroduzux.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf675d020c---82383291308.pdfIn PDF document text
    • http://renovator.cz/files/file/23910353372.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/959fc0601f200b53434aa039b4d990ef/78752354360.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093c2a9cd2fd---bipiw.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/57ff49cc2e929d7d6e166e2f6bd9ec12/datusudujoliwewuwa.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080ad9294a86---vesusiju.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jefujumipijekarav.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/27306170658.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/71170092001.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c45911bd211---gidunumimolutaretozufis.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071d9812b2eb---kuxuzadutigawewodinigin.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/k0fvnbtugb0t703q2ubintbmu1/49631599971.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/phnl3vcdso9lsonkc4np3djpu3/lazeduwinu.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da05f6148a---45810552946.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_off00013937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13937 18104 bytes
SHA-256: bed98cb40fc1a9dc778eefc21f0052589d94c8b47e7f62dec7197dbbfedc50f7
font_01_sfnt_off00016821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16821 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18038 10500 bytes
SHA-256: cd25eaf73ea6dfeca866a6f5b46405e591082add1dff9cda2272d90f9bbc9ba8

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