Malicious PDF — malware analysis report

Static analysis result for SHA-256 065a69a3af2ee343…

MALICIOUS

PDF

80.4 KB Created: 2021-09-03 07:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: da8a34f36db806e9a21216d8ee17133c SHA-1: 70cf3b99ecdd1680cf7219028cf6ff662df1cc25 SHA-256: 065a69a3af2ee34363bd659c654d5a92bb924a95c71e56c12671851101b585e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ketchas.ru/uplcv?utm_term=ncert+class+9+science+atoms+and+molecules+pdf PDF link annotation
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/5b438f391e7d17ed94861bc5e7b78cbd/pajabuxalepexuxozidutet.pdfIn PDF document text
    • https://maisonforville.be/documents/file/zejiwa.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace9eae219c---17067868113.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/tiragewufepulezatopu.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161008deec9012---fitivupururemidenotutovuv.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/gunaf.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062822560871.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/kuruvisalupevovogujiz.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a84fb65e4---zibaxowelibemawatu.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/26182686950.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/fidovi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/83224dbd9f017e459aefd24cd9bd18c8/jadibabujomuxirotokafixej.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/rekevimogegojifofojisiza.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085102758548---pabuvige.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/57367565058.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/rv212cu94t4mh9duoee9tesaff/94970990958.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/651452e84e1901cc35e82d1ec33b744e/43388235134.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5311e1c4b5---84851339926.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/65277721046.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/07536rek719gqauqjb7ga0od0f/dimupazo.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/kuvukuzibefonerugibibutu.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/a71959cbeb2250dac022ab323f526dec/12611353267.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210817231321.pdfIn PDF document text
    • http://cosyromania.com/media/file/favovuzev.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_off0000d308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 11024 bytes
SHA-256: a866a3ee2d69adf4345e3950c77dece7dc4585dbec236ef9a109fbcb8512fe18
font_01_sfnt_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 18168 bytes
SHA-256: a5c878a0ac9081b1e9291f56561730d407dcf51dfea1abe7def76ea592c0dd04
font_02_sfnt_off00011b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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