Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f067f61dc936906…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 19:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7e1f62336a986ae5b137ed009f15aa58 SHA-1: da092dcc6ae2f55f885b1b4c2c0a0c071cae7ac0 SHA-256: 6f067f61dc93690691311572cd3841a2b1efba786f9fbc3391107263eb028046
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable domains, indicating a link farm designed to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://mtydizayn.com/userfiles/file/dujozenogafuzegu.pdf In PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3efbdf31df---61141720777.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/a5rs7p81shbqtufmvi01rg8fd5/10438146215.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/gugosasesotuwa.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/84662735964.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/a90cd1ecf40d09fe78290d0167c3e25a/jinusanadewavetid.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087744297450---nigudodopulopifanimu.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/70114951078.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/14471292399.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/bisezuvebafimuxobubilom.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/4343944489.pdfIn PDF document text
    • http://hotechike.com/files/files/sexujolijixiterumin.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/59d9c671404b2ad5d8e14f969be81b18/55372477350.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/luloramubu.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611edaa584dd4---54244609227.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/bfe28e4049d07dcc7ce34b383b6b7021/7311921858.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/36296393497.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/liregefafitip.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/32963957207.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/wikozubonibuxixep.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/losejorobatureb.pdfIn PDF document text
    • http://tp-pos.com/uploads/image/files/51242169545.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/ii9vv2hbrtifbs7npcohrgdtm7/38001569749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=good+vibes+good+life+pdf+free+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 10908 bytes
SHA-256: fb318e01b320027d7df2882f2f602b7621b2698eae66a9f24044491550cf6883
font_02_sfnt_off000111b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B2 17692 bytes
SHA-256: 7a4904921596ec41e79a3044b1ee80860f63bd4bb7563123d20e557b458fd5ba