Malicious PDF — malware analysis report

Static analysis result for SHA-256 292599d724b1ebda…

MALICIOUS

PDF

99.4 KB Created: 2021-09-06 23:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c07e67807cf268df70717bd84b08387f SHA-1: 78a5a9b537f992f83b54276d34e1c5e5cb1ca585 SHA-256: 292599d724b1ebdaa4970f65e8437e344570e78b0217af1e41db1c62113ff93e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

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://nomylo.ru/uplcv?utm_term=abbe+3l+refractometer+user+manual PDF link annotation
    • http://digemnd.com/UserFiles/file/44515629815.pdfIn PDF document text
    • http://svx.su/ffile/file/sulemizebizinexarebu.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad93a662a---78934592739.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071b9f7672e0---90922290213.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dc7e3b9ab---22071073913.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160807b3c9af0f---48268745796.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160708e758a0b6---natunidufelufopo.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0805d20d106b5d9431133f24a2433b7f/60397161931.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/bivixo.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/83595878738.pdfIn PDF document text
    • https://limsurdua.com/contents//files/zatadunefetuziwolagiru.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f98e90426---16926305480.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607439f1506cb---gexowe.pdfIn PDF document text
    • http://pgnsualumni.com/clients/872691/File/vapekexalepavobubitu.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0712b97b7---xubasabulubumiguviko.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/98266998287.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/12660164777.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/nafoba.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/24577344280.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ea297a13ec05642ec87262c8e3e4c697/89431473021.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/51471101949.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b510ec26b97---texutepa.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/miparilugejidezisej.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_off00011e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3C 10796 bytes
SHA-256: 05d247b1cde68b4c0fa5c0155dbfcdd677a479f4662fca53a350f24a54fe0de4
font_01_sfnt_off0001373d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F4F 18496 bytes
SHA-256: 5e6b18859d4807b870789f560ed25063229c7102bead94678307daf9924f5e16

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