Malicious PDF — malware analysis report

Static analysis result for SHA-256 216d7206a8a097c7…

MALICIOUS

PDF

82.4 KB Created: 2021-09-04 02:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d436754fe07c4e9b9a07212620b534f1 SHA-1: b17be3c5778809ca39c5b614216c4bbb96faa3d2 SHA-256: 216d7206a8a097c75f0966f772e7f22703d408acb9388bbc33c1804637a9de4d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/4f2be7e5e820a32008fb2c2d4b4824ff/6149446560.pdf In PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/zokezojobirimewexujitela.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/futubez.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/18a5d3d3ebc7502f59b101873f26790c/rojobeloz.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/wojurozaxodo.pdfIn PDF document text
    • https://kopari.hu/files/file/39334563352.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/57284766237.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f90b00d825---jepasipaw.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb12992eb9---tofotituzejavog.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609efeb40a5c1---damobitu.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/7d1a7256bbdf56bb2b8a04881b6dfa4e/44104730923.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cfd7e3594---28996037434.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16095338e553ef---59369910668.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/91802973254.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210901_9373FFF7BB120274.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/b48c840f4c001affb374e0ee88c596ec/fameroxevopaxabaxaluruzu.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/1dee4a397bad91d251b5f1d244b95b38/pubafitagiraxasemamivuk.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/90566071011.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/55724106567.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/2542233091.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/powaviwuteramija.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/58325810030.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/rovigawogawemuso.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ef7e2ab31---24622832829.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=lobbying+disclosure+information+manualPDF 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_off0000dc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 17484 bytes
SHA-256: 468b1a6db738896c6101a9057891a9125fda9d67d501f524b5ba85573564ef2b
font_01_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 11132 bytes
SHA-256: 1c045de2c78795e6799d8ba41b541c36f873140fe06bd11bc56e4656cafb5384
font_02_sfnt_off00012398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1