Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7bd2056c9f502f…

MALICIOUS

PDF

86.8 KB Created: 2021-07-27 14:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1ef95ccb77bd526b7c3b9942ac4c1a39 SHA-1: 5982156e1fdbb97cc2606653076ebe65fef396ed SHA-256: 0c7bd2056c9f502fcdac5d4f613c0f8ae5f903b950d4008e207fa64ed01a64a8
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to potentially compromised WordPress upload directories and disposable hosting, suggesting a link farm intended to redirect users to malicious content. The ML_NYX_PDF_MALICIOUS heuristic indicates a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://bititechnika.com/uploads/file/67261489102.pdf In PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/fe026337b121375e7af3f60372eb94c6/terawatonubu.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/11776936993.pdfIn PDF document text
    • https://verner.lt/images/files/fipusasodibefolaxikutip.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f9fb79e2---xaboxuvijujeza.pdfIn PDF document text
    • http://envigest.cz/upload/file/96536943057.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6fb91b922f2f72c0bda9316e57689577/fujalagudaje.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861b9a99e10---xitarovapifew.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5e7d5a28e---vupajawixabugozokura.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/zakedexebeweketujute.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/5286025112.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/f2da935fbb9bff8708e26e9a1c77102c/kaximuruxos.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/99544130958.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7cdb39657---kedipawavanipusapolazirus.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/28c8f171d23245268b27cef057e753fb/43895619475.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210708010159.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/tuvet.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/xabuwa.pdfIn PDF document text
    • http://djapm.com/userfiles/file/59398200357.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/529583d02e28046e381a854442bff59d/buged.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/401f43a8a7b0e1516c8640a74323a4ce/98009631502.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/23627716827.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/winodopiko.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741c1670802---26529667842.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/sitawinixufunepawigojaja.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/176k0vn6dii74r74d8hj3du43k/duvotu.pdfIn PDF document text
    • https://daismene.it/file/muxataderiwijupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=definicion+de+la+cosmologia+en+fisicaPDF 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_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 18040 bytes
SHA-256: 0ceec9fa6076adc66fd9b6100d3fcad0bbdcf4796bbb7f4bb217ad5dfebf193d
font_01_sfnt_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 10620 bytes
SHA-256: ce522e4de98a04cb7712361edbeb0aadd7379b0b6bfbf087fe4ce3450e1a6c6b
font_02_sfnt_off0001340f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1