Malicious PDF — malware analysis report

Static analysis result for SHA-256 327ddb7e794beb32…

MALICIOUS

PDF

92.6 KB Created: 2021-08-21 00:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4d9f9048c5b5f591cfc7456b9b8aeeb5 SHA-1: 134b5bab0440c6a1e9d561400437e84df03039bd SHA-256: 327ddb7e794beb32a8d00adcca0d861aede4e836c732ebafe98aa2be3a783972
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.pattyn360.com/upload/forum/files/xorojotosixegufiditiloxi.pdf In PDF document text
    • http://immobiliareborghi.com/userfiles/files/50952002354.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3f901d255a4abb2705dd7f4960db0491/2299449118.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/5ifeqkqjimh6p070qtjvddi2v9/zirafojomi.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/sivivifovufolukuzukewafep.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e227f8f460---17420951362.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/75u7m9ka0vapsa6v8snaokshth/zifodejavabol.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/dodal.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/zefukusib.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/delogaruxavubiwiguz.pdfIn PDF document text
    • https://nevisnews.com/userfiles/54063284650.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/54950546887.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/kebako.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c46731267c---roxamujorizomobelumopa.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/ragabufavupe.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbcba847eb---dakukoj.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/6488019909.pdfIn PDF document text
    • https://drlanda.hu/user/file/56379980387.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/16248068023.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c337f71e1da0b78d773eea44bb456373/nawoxonigalozosuvakal.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c483b4a7bb0---gezodisexadoguwixawusoru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=nurani+quran+with+bangla+translation+pdf+downloadPDF 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_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 17552 bytes
SHA-256: ba0f48ec1ef1908b6b4dd90ce5ecd268388d21ba84791ae04ba0a81fd35fe278
font_01_sfnt_off00011a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001326d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326D 11096 bytes
SHA-256: c828c45e9eff6632788c750bed0a5c1a917bb219a4116582940a23613765b20d
font_03_sfnt_off00014b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B78 16300 bytes
SHA-256: cf48b691868a259c9a47f330077ef157433a70b9d03653b9765cd482506ba2f0

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