Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7032fdba8bbdd9d…

MALICIOUS

PDF

85.0 KB Created: 2021-08-05 01:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ebd661a634d3f3aa1785dff689d9ca60 SHA-1: b933ba0e25464ca4f5afa0884fd6f3e2c9328910 SHA-256: d7032fdba8bbdd9d26e04fd7ad4c6b1357c1abb106454cb010d2421c0f98432c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_INVOICE_LURE' heuristic indicates a potential phishing pretext. While no scripts were explicitly extracted, the nature of the URLs and the ML classifier's high confidence score point towards malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://infrive.ru/uplcv?utm_term=how+to+book+free+eye+test PDF link annotation
    • http://www.polni.si/Images/files/vinokinuxaf.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/zinemozajuzeniw.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/29803110876.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/sosupajozatisip.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e367fb83---segupenonedobipedewezuz.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f2905652d---wuxabutu.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/52986737709.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/47865137746.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/81703740975.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160896faa98685---6898516009.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/66846470418.pdfIn PDF document text
    • http://kag.fr/userfiles/file/boloraporubudakizokaweso.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/38439428349.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/jepazowalamojafix.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/wovomazejanawelazepele.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080999e98e41---1785217422.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af75e670b39---78355408161.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/e1b89625aa5b83687b4b9407bebbd897/lokegipu.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/83721839428.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e422d88e6---popuvowilaboloko.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6644a11d4---jenizan.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/1tag10analf41v849s37a8b4h6/20405227307.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160becc56bd1f3---mezupanakajonema.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/redafasef.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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 17124 bytes
SHA-256: c992fc3684f5c64a10f984e63fddf0ead0f0a780115672224cc01a7ef86bc8a9
font_01_sfnt_off0001153a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153A 10224 bytes
SHA-256: e96f805709e7545933188b6541df33d2abe2f4a288c851ec7e82c19f95ceb8f0
font_02_sfnt_off00012c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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