Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c2a0a7219f7a3f…

MALICIOUS

PDF

90.9 KB Created: 2021-06-29 04:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d89ec117820cbdfe23421e9fc4e5b2f SHA-1: 65e68a423f068a37e1c4decaf5c4c932aefd81b7 SHA-256: d0c2a0a7219f7a3fd667c9d981ead0575c8ce95cfca402a8a2b5187d8adf7cea
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, with the primary attack pattern being the distribution of links to potentially harmful content. The presence of numerous links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085aa64ecc57---wuzapasisalekogi.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/jpts2lhcdcvclt16p6b8io9a05/zudiwabarujujidexu.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/08029b0dc0f347f4258294ba123bb06c/31204839371.pdf
    • https://101doctor.com/uploads/ckfiles/files/60c442a2e92cd.pdf
    • https://kanalprofi.at/UserFiles/file/2402164846.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2nkarilhbh9tv1gg5fj45l0ga0/pavoniwemarise.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16089e69a787a4---32661048802.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/98028305385.pdf
    • https://lesura.net/userfiles/file/42789801568.pdf
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/dubirigewimogudijas.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/bemodojumixobinonudalaf.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da6ed456019---venadixoseva.pdf
    • http://headrepublic.pl/images/files/12637041621.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee30942be6---50788036695.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073057bb1804---24895359495.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/2hc984bb8euessuq1fi5cpriu6/6833253524.pdf
    • https://alice-immo.com/userfiles/file/62983161056.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc748f817e8---kufojilidetoni.pdf
    • http://vogiantinhmach.com/media/ftp/file/zoxiwof.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b3bc45a5---83977804970.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/47273709429c724de4e925dcf93c6847/73504990663.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fe0d5ce39cad13f6b0b1120a935cd7fe/tapegetedegifixadexado.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85300abc5c---raxamovava.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae0acaedfb---dujekopuwobujiwovukuwi.pdf
    • https://agatanorek.com/files/file/54519572628.pdf
    • http://daiichibus.vn/uploads/news_file/19261462599.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=bishop+ussher+date+of+creation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010222.bin
219e163df5b98b1645a00ab2696aabc9824cce2222911178081942016df575f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 16720 bytes
font_01_sfnt_off00012d6d.bin
f83df17854aeab4050668ed46f3ac24cad8a37b9a79750488ed49792ece4a035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6D 10824 bytes
font_02_sfnt_off00014664.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14664 16792 bytes

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