Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2bb4d80a38b66d…

MALICIOUS

PDF

115.4 KB Created: 2021-08-02 12:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b1313ae156c7dfb966b1cd7c56dec825 SHA-1: fd120bbc03b83ff9572485c985a31cd944828713 SHA-256: 3d2bb4d80a38b66db0d291b460b36aca6ce5d439264332d70c89d5d761cead17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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 http://alphabodysupplements.com/newerac2c/userfiles/file/4924408004.pdf In PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1cbcc2adb712bcb642df47812ea2270f/72178428874.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/befuwanemubobosadaxat.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/vutifilujo.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-23/20210523155514269318.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/salitixigoxifuwatixoxe.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/59627297954.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807950bfcd2---vegume.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/8bf2cd0a4fd4a755d6608015125024ba/63927289936.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210724_E55F1D12C2C8037C.pdfIn PDF document text
    • https://unosms.us/userfiles/file/jomupozabotemabitixozaza.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/zabunu.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/90399937720.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c133bb8f859---47352673404.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-14/20210514142703920586.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6f10e7bb6---93021406085.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/49090085541.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/be4186634395f39ce91061a86b4298ad/27115763754.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/45997419210.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/6fd0c45719dc6d6d30e882d347c55b1d/74956796036.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fde142bc27---tabavizetimerogoxeme.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d147385526---tinatokigekulawof.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/4991118d72189302a314247b8b95f6f5/35545477870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=como+descobrir+meu+orix%C3%A1+guiaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14687 19604 bytes
SHA-256: 8b92a4f20260c52a331a008f49d085f5059c0c05d1c54803a982236baac2b72f
font_01_sfnt_off00017637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17637 11016 bytes
SHA-256: 151f60c7450708d1463b8fba29b8e8284fa5a6f62319300eaa1d66e89a87ffb9
font_02_sfnt_off00018f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F45 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off0001a550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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