Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fefaa2847a902b…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 08:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2aed358b0bb75f4d4b2af93f237e57f5 SHA-1: e18727be1df8ed3a4a98b2eb6d2274568851128b SHA-256: 40fefaa2847a902b10b81f1dd6f121b215b434e161425ddef4eff020084dd415
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 compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.espaciocultivarte.com/ckfinder/userfiles/files/zitapakupabaru.pdf In PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/5047f24fea250917f319d014ab85e40e/pinakaramuliniduxutewatu.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/79342173164.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/runuzevosazedifajekonobu.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1c0debc5a---febakokixalowoponab.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/3430625124.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/489278089e61803093744a039e3d0f84/52466818297.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/11lo7e7b86gp3irdrlvoce5s0v/53947803639.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/45993575888.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/43871766795.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/29672834217.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fb6a0b5e0---7975746221.pdfIn PDF document text
    • http://sbairs.com/datas/files/53120610667.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609436a4ec038---14066251613.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/prd3ppqiqsch6o8jb0urgmelmm/57598600100.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/54013d3da228d921d2a0930dd400d46e/gusab.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/jigamebex.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/18794890385.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210812230759.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/nevegini.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/nodebuwetovorot.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/37646214477.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd2364d9b7---35547433449.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b3512cb60e71fc8bd9544837add5a2c4/82944073190.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/jibamugifosamowe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=clash+of+clans+town+hall+7+best+basePDF 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_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 10548 bytes
SHA-256: c6c4f74070657f4911548da4c525aad727a53e8ff2e15425bf0561d1e74feaa4
font_01_sfnt_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 17992 bytes
SHA-256: c22a30f1e3c94bee5a7fc2a6a6001f1e6410e85329c9aef9dfaeeb335372d417
font_02_sfnt_off00012887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1