Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3f202b299ddfde…

MALICIOUS

PDF

97.8 KB Created: 2021-07-28 06:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45fa5e2056a90060fd825d0fb128f18e SHA-1: 639fa81c93710d1efbe2df1fdc12a41933a05fdf SHA-256: eb3f202b299ddfdec6a42416177f934486de0f04e7ca0a7684152f3ac3111cae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to host and distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/kgsqbocfst3gh0jmp8c9u8e92n/gujimetulatorunamezepazib.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/1b8e7654cc3a08d34e3cb88a9e6214ce/temukiruleku.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087b8d90b052---95933226539.pdf
    • https://wsbtitan.com/images/file/livutejemuruzasideganobo.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fab756bf07---kufusirunavojiwa.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16081b6d2a62b0---mazuxevabekuzitasamebi.pdf
    • http://banphimchuot.com/userfiles/file/dixosixiwaladuvevere.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e2fa741aa---60564903190.pdf
    • https://immo-cjeanpaul.lu/userfiles/files/91620982240.pdf
    • http://atomleasing.ru/media/File/77872242611.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/v943rkd545mo1ai5meairlj5p3/29791533264.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/32820834781.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf8d33fbe---22567658297.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/dcef6e1ff2a1c2ebcb14880fcf9eb744/7040235424.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ae5097b914fe0ef2e7240eec1d265600/mifupe.pdf
    • https://marjoyunlar.com/calisma2/files/uploads/waduzum.pdf
    • https://nepalimodelagency.com/userfiles/file/fipagezagobogapumuxofif.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/2g48h1rq4c64vvj826qsaolcfb/24518677491.pdf
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/46280089412.pdf
    • http://meteosputnik.ru/userfiles/file/gaposupebaru.pdf
    • https://iringmalaysia.com/ckfinder/userfiles/files/58634880722.pdf
    • http://pampa.be/uploads/userfiles/files/59373588906.pdf
    • http://andrewsexes.org/clients/867461/File/gejorijevekoxobolomab.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=samsung+galaxy+s5+firmware+free+download
    • 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_off00011a85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A85 16792 bytes
font_01_sfnt_off0001329c.bin
229e728e831af61478d547398a5792bc9daec18052d46845121ba8ed6d62b103
pdf-font-stream PDF embedded font (sfnt) at offset 0x1329C 11212 bytes
font_02_sfnt_off00014cb0.bin
0178d8773acf62983a94097ed9af6e1f066f49970f420d426d5838933774eb80
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB0 17384 bytes