Malicious PDF — malware analysis report

Static analysis result for SHA-256 996380c8e9fcc2e5…

MALICIOUS

PDF

88.9 KB Created: 2021-06-30 14:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2cc6f8e4d2ea9e3c7e19de81b2e652da SHA-1: 22b59b6bee1f5e04a2565b4ea923eebaef56e233 SHA-256: 996380c8e9fcc2e5bb6c7e3dd07fbeb72cbb39c333af529df79842eea8ca37c5
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. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=rice+water+for+babies+with+colic PDF link annotation
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/b3b4df78714eff44ac93b676da23017e/masifem.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/bepox.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/gojazivitewedufuvofived.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609eedab158b2---levizaxaz.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/f905a1ec15055318f0a1c9dd5a43ef81/jefarerijugegobab.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/t5b4t9qbbnnjah45rmk1jaosd5/4048805901.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a2f6a0bdc---fopob.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/tudufaxexasuvijutobaxo.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/lerasulolaku.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/nezejamebojusalijos.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/f22b37e039ff98ba9cae62038c8bbfac/92770001900.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d56de9374f4bd2a98e948be486e8f2bb/nupokumafofan.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d09310bc3---xunomimefizavegolixifusig.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/21178300896.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f913b3754553810b6e289c7704661e45/sonuvo.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb7a9f326---petoxesitamezu.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/gerapuwaxe.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/kikekiseludugobesepud.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160839d1d5753c---totorizo.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/xajuzuzivazodalij.pdfIn PDF document text
    • https://bnovum.hu/downloads/56697143059.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5619130e1.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_off0000f934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 17208 bytes
SHA-256: bfbddd89db322ac0d69f9a41c735b717d23d783dc0fe7335423890b98199ce98
font_01_sfnt_off00012613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12613 10600 bytes
SHA-256: 495453ce6eea9ebcde7fc3c18e7c8756564c220aa9fffbe70b1c7e1701394319
font_02_sfnt_off00013e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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