Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd5d4541c9e91ae…

MALICIOUS

PDF

92.1 KB Created: 2021-08-03 07:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6959d49db94ea684f013bf26f6cabc6b SHA-1: baf5f9ebf9d96e87cb962334f9e12644e83d3ed5 SHA-256: 0dd5d4541c9e91ae7b1951ea1f4882feae84041a631d5495c34fe4f482008e6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm hosted on compromised WordPress sites, suggesting an attempt to redirect users to download potentially harmful content. The presence of external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/063cc6912ee303f7ef2910665c5426eb/zobutesutetu.pdf In PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/k143njvu48mfd04hhc0sg63ke2/vagaxuwupo.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/vopefaluzenug.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/jinejunog.pdfIn PDF document text
    • http://mobiliteit.nu/files/12230213849.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/g3m8ov6lop504m83087df2arpb/vavanupizekezemezufawip.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee0f3ccb8a---peleluwolalor.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab97f0f1fce---wozubiwusapatok.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/6ag6rjjvg1eo3cfp5oqdh3btr2/mijatukadirosawotegup.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7c6a53ba---zewenizopej.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/32578231653.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/dc0c221e97f72b50dd488fa7ec46f497/vuxarugosagutewi.pdfIn PDF document text
    • http://giaoducvietnamtv.com/images/ckeditor/files/vutadelizes.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/87424342863.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610882c4a32ce---27954075457.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/32917041028.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/2be0f6ada4a57f3ce988568ac82cb7bf/2796466539.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/51307696076.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-9/20210609044447832875.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a66b0401879---26347751854.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/v47dev984s2bb2vdrnntnv3btp/55388933233.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e9455fd408a---58947663810.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/13844198949.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/f98b5bb0129b91731f9051b3073f1681/zopigerakojinim.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d800a9a0aea---dubifevixavev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=download+naruto+x+boruto+ninja+voltage+mod+apk+android+1PDF 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_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 11336 bytes
SHA-256: a7c179fd7597c18befe786681929f9dae53601387e3dda31e04bd0c038941bc0
font_01_sfnt_off00011a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001328c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328C 17628 bytes
SHA-256: 72dc323b579143a2f8784475445da988d153529c1446e66af3d90ff2c3595ac4