Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7cc0bd1c57ab1b3…

MALICIOUS

PDF

95.2 KB Created: 2021-09-23 00:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dfc901232abadd4188804674b73a4db3 SHA-1: c7036bcd51efeec73be2d828aecd791fbf655c45 SHA-256: c7cc0bd1c57ab1b356b0765c8e3eeda70c7da7fbbb23d51a5e1172d1b0767c8e
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious content. 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 0.9942

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.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131059832563---gebokifiwiguvozagilutav.pdf In PDF document text
    • http://batterseataxi.com/survey/userfiles/files/ruluruzarozosepe.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/40259132816.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/poguduvipifuzujinek.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613531c6affbe---lemigop.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/79951854222.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/vitixuta.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/zazitugazinijatezi.pdfIn PDF document text
    • http://acelybio.com/upload/files/69070045742.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/63663680328.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/546d3f678b1a342ffb9605235ce013e5/82940816277.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/34062669033.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/malawafefajololamapewog.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/vb4ot7kn7isn0ev9frs78r8s53/foworedikigarosoju.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/xopipemuti.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/vuwowiwuvuwakovewug.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/lojokapomexafisujasibeji.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/vuzudakaperega.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16132c1b19e88b---nosemuzo.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/70610381819.pdfIn PDF document text
    • https://kenkochaya.com/user_data/ckfinder/files/dedisedovu.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614849f665a4c---82345971669.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/9321052700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cytus+the+beginningPDF 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_off00010d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12559 10344 bytes
SHA-256: f860faf37eb39d6fc6c4a8b955c43e8d39af7ed03a663e047b75584b14549c90
font_02_sfnt_off00013cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB2 19392 bytes
SHA-256: 2cd01ab0768afcdb206d314302139d9f7ef840199c12d7958af51bfb1bbd5d74

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