Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7c925babfc9df5…

MALICIOUS

PDF

80.7 KB Created: 2021-09-02 18:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 976687297ad6d723f69d20f2fa1dc4a1 SHA-1: e3929b141bde29698cf36f556259ea5c790b0198 SHA-256: 0b7c925babfc9df534415b78d9d07e1756de9a5045d3f4a729404628fd164200
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 domains identified as compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://arcadia-fitness.es/userfiles/file/fikesuz.pdf
    • http://dralituncer.net/userfiles/file/vigubazokilu.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/dd85f15a7fbd0c96a63d4f9f027cb6a3/14024049090.pdf
    • https://projetovm.com/uploads/files/62735869388.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d237d9b5fed---55963730071.pdf
    • http://sarljarry.fr/userfiles/file/73708593362.pdf
    • https://vialivonica.eu/userfiles/files/suriwejatezi.pdf
    • http://ventilatoryzlin.cz/images/file/32521855460.pdf
    • https://amadesafar.ir/basefile/amadesafarir/files/faxojobadulabinol.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/08d38779f57c1cdcce2344fe65389db6/65147008318.pdf
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/betenezulijiwa.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c25621a8a03---34155556903.pdf
    • http://proreferee.ru/uploads/ckfinder/files/43703866061.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160837f093fc61---mozafeduditobufijiw.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4054c4d5b---49675598117.pdf
    • http://villahetzwartepaard.nl/survey/userfiles/files/21943662557.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93298c8a8e---munuzadozumafenovajeden.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/mejuwiwojov.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8571a756a7---45364815660.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814126d06a9---16424496274.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160af6edf8ef20---sajanaduwixiviloz.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13aacaf552---judavobuvaxiwapun.pdf
    • https://henklinders.nl/henklinders/upload/files/76044869205.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/16624c334a3637ca89592badc5fb2cc7/97709736785.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadc19156b---63221177384.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948b5042ebf---46848541826.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=introduction+to+cadastral+surveying+pdf
    • 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_off0000d6d6.bin
55917a97f3e575994e879c98b3cfc96dfb84db444073794106f11fa88fb9883e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D6 11028 bytes
font_01_sfnt_off0000f07b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 16792 bytes
font_02_sfnt_off0001088d.bin
8bfcf0aa70b6161603fe39ad5f153b103433aad90be5a1b8bbdcde0f8ce279ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 17196 bytes