Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c12075d8b94387…

MALICIOUS

PDF

88.5 KB Created: 2021-07-08 13:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 512e0bf37e48c19d922560a2606dab23 SHA-1: 604439d76b5476660d6a724bd419089be07515f7 SHA-256: 60c12075d8b94387e114693802dc36e633aaea5d6f044b240bb5f7b8699e16d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links pointing to websites that appear to be compromised CMS uploads, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pistant.ru/uplcv?utm_term=before+we+were+yours+pdf+online+free PDF link annotation
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/cbace67c6cd043c5db8d859000ae79e6/senabugamumudul.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/3bomoavs7t169u9bq1t75fseok/fejijejevedapol.pdfIn PDF document text
    • http://www.asslar.de/downloads/lerokapajikenotu.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/73du9a71v5nt41jso9eeu4q4d6/11897971535.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce164cca87---zolivulofukez.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/65573063701.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b77fb3e018---paxulapunulaxusolija.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/sumokagoluxuguduzu.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/dd8c945c2d610298f668681c0096795e/miduzesapad.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/4630570261.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160726dcb003ad---sibupudoxudunuxu.pdfIn PDF document text
    • http://goref.ru/files/file/wemego.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609906cea2de3---sotepobuwovikedikuwaxa.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a07ae8018f3---vesejuv.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/28615314383.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/kagoruxinuzapem.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/83697525019.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ep5huttopuqsg8r1tmkqdqeuh2/84389795089.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b1280587bcd---simebi.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ddotbcg3u37qug6tifti44llan/88020509327.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/sokevimori.pdfIn PDF document text
    • https://botorka.ro/userfiles/file/31760062238.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbdf07fe7a---4159014733.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_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E94 10584 bytes
SHA-256: 81eab1be09cbfd1c35b6ecf9cac3582c186324af8caea7079e9dbc25946bf429
font_02_sfnt_off000126e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E5 17700 bytes
SHA-256: 87796bf179291570bbde212b9ea8278b0b1d1f672a6240e508d1ae54b1a1a18d

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