Malicious PDF — malware analysis report

Static analysis result for SHA-256 970cad8e1c604af1…

MALICIOUS

PDF

150.5 KB Created: 2021-07-02 22:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eba79edd2f1fd27a32a773578e54141b SHA-1: 1e5912bb6e32a3e8b673861d58b0aead638dd84d SHA-256: 970cad8e1c604af1444800c2fa97dfb0f461346259d83beff6246f3a45d3323c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/fedavijaguwaremaloja.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bb13ab1d8---14012569266.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160acea863347d---31641375773.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc4de206a9---wewevotakepivowopojov.pdf
    • http://papinchess.ru/userfiles/file/zoluwebewojetabu.pdf
    • http://fdscience.com/UPFILE/userfiles/files/logosa.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12a70df5d---lumazutabamopelap.pdf
    • https://atkarisuli.hu/userfiles/file/dosinoxoledepajunuwig.pdf
    • http://pgnsualumni.com/clients/872691/File/66908950015.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/6aeff3d6d8043ab73e63213ec283b64e/76579001671.pdf
    • https://prastosten.se/anvandarbilder/95/files/dogosijudozokusuvizoba.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/6caff9019a370064b35dc29f88e3d31b/36455386807.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffad4e41a2---fuwanatiwironavizojupo.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944db911224---risukekosu.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e10191547---watafuxadavaja.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094a995ada78---19246643971.pdf
    • http://kme-kme.cz/files/file/sedifulelogowigipadan.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b54b8880054---juxuvin.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/fc3058c1c022c3bf3a0d1fd94ab2f34c/39241710544.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/77c09e5977f0e4254914d164ec9fa8e3/vojumatoniwakatibetasoxaf.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a44932656---84522904448.pdf
    • http://doubler-son-capital.com/photos/files/limefog.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/1a4560316566bb96d1f758b065ad7397/58428928661.pdf
    • http://chickendaylacrescenta.com/uploads/files/popaguba.pdf
    • http://remont-elektro.eu/archiv/file/94682873057.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=angiosperms+produce+all+of+the+following+except
    • 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_off0001dce2.bin
cfd0b45753212472b6fb97c9485577355f2a3ab4223796c44d92e25b8b5d0ca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCE2 23596 bytes
font_01_sfnt_off0002177d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2177D 16792 bytes
font_02_sfnt_off00022f94.bin
81161975a1b64c601df5eb861f1fe8653c9d7a582738af94ab0d00da81555cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22F94 11336 bytes

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