Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea23f5dba0409c9…

MALICIOUS

PDF

81.4 KB Created: 2021-09-06 03:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 68f0ec245f458e30c71c8b7c875641e6 SHA-1: a73f213de1e1a1da7b5a0af0c8d2b66c58f4e2e3 SHA-256: aea23f5dba0409c9b6e96577f89eff8797586ce301ee838898c18524fa1926e5
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or link farm attack. The file's structure and URL patterns are consistent with malware designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://drafthe.ru/uplcv?utm_term=khuda+aur+mohabbat+season+2+novel+free+download+pdf PDF link annotation
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a162c4930ac---dudiwiza.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a6a4b4157---xutoroluwerodoxezuj.pdfIn PDF document text
    • https://www.jedeminute.de/wp-content/plugins/super-forms/uploads/php/files/8ni2mt2t2k93ivudn355br3vh7/powopobipuzajilakaruf.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/gabofamabowuvomemakamep.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/30915557884.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/cf594bb87ecc70dd17130968ab5845ba/44811428224.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/de413839add3560f977ab26f02793113/71055755795.pdfIn PDF document text
    • http://yejida.com/userfiles/file/249451402.pdfIn PDF document text
    • https://egca.fr/userfiles/file/rumerobodibolu.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/85925170169.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/vevj8kfkd3e5lp2auttpt67tp6/nikomepazilosepo.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/834a3106abb7815e54c398a52d57a840/84921486139.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/0eb70f773c71bfa4d9f4532b85666cb7/lexoneruwegugetokimif.pdfIn PDF document text
    • http://teplospectr.ru/images/files/36190369932.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a07c9af2559---gibutidavizubajoninokefuv.pdfIn PDF document text
    • https://tebra.si/userfiles/file/18677101222.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/32551111410.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/zameganemubadipopepofejez.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/6e2680236708b7fafad1fd9b9b9fd054/duwubib.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/sukutolikigabokejetofe.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827bf85ab50---buligu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2b196d5e285e66e086911affa54625e9/82137952183.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609faa418e8c9---28097421370.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/45476815520.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_off0000d562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 11172 bytes
SHA-256: fc41fbc360c52ab3df2651ced4d3cdfe32ab2a4176d3c89c35c9416aa5beb5cb
font_02_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 18488 bytes
SHA-256: 45c68b270a2b378110330503824347ebd94ff6b89347e96e6c008bea655a0dc6

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