Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad29794df151f9c…

MALICIOUS

PDF

84.5 KB Created: 2021-09-02 12:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 82fd738692f4e952d6d6288ec9c06d1e SHA-1: cd9248b1a69f64be585e42091f23cf8a94129ca9 SHA-256: 2ad29794df151f9cd23340826a56c077dd1756cbd8da9e571456254ec59d044d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the extensive use of external URLs suggests a redirection or download attempt.

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://inwebjor.ru/uplcv?utm_term=english+grammar+lessons+sinhala+pdf+free+download PDF link annotation
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0e09bd267f1597bb7bd27547bd956117/ralidemevaj.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8f2461705---87055814607.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/kivotijokonade.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/25057536006.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/kowijujupob.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f3e37d5b7937f798dd4d030d02d7c2fd/85823688225.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/xalarijutubomigo.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/malik.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/28250923799.pdfIn PDF document text
    • https://kawanmto.com/contents//files/poxipatef.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607590d86a2a3---63709816131.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/90435368225.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/juvur.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/9ocr1tp33rhubd254mt8e4bmv5/motisesesezorasakulujubo.pdfIn PDF document text
    • http://sun-eko.eu/files/file/39366390594.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/47524542145.pdfIn PDF document text
    • http://veno2.com/upload/kojilokezojujusaxi.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b836955cdb5---suzep.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/zomimikikapavup.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/77947180364.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075519f81507---vawomikilamubejozozigukeg.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/13342044713.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808c62ce71a---lofiti.pdfIn PDF document text
    • 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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 10916 bytes
SHA-256: 8c90a14cb97dae014c66878b42afa6ffec0ff8b65c8b8bcef58e14af2b05e2d9
font_01_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 20716 bytes
SHA-256: d67e1a9052ce44764303937870a7c2ff2c3ae744b5c872b83d2413697205825e
font_02_sfnt_off0001298e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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