Malicious PDF — malware analysis report

Static analysis result for SHA-256 5877ea398a2dd6fe…

MALICIOUS

PDF

77.8 KB Created: 2021-08-12 15:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: af9fd45f8569adf7b84bd83b7f9d31fc SHA-1: dbfd0879624a41ebe84c4921798c608f7d04e6b0 SHA-256: 5877ea398a2dd6fe164f483507fd1d5d4150106ccb244b24149bc0a2e75fd734
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the extensive link farm suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://klinok-saintp.ru/files/xadiweka.pdf In PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c90c0ec18---85994272100.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/56395435997.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/ae617a3113d82612f3f6f14083888771/95081294308.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/16659594895.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/05982925e23736ae9760da9a6f2908a4/15827737339.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/bikujesosu.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9a6b6bf3afc494295031e15fa950dda7/zorakabeg.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/fopodi.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ixixafuxuvevubakutoj.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/mikqcn41s8j4ndig7kb9h3qchu/tomujewo.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210618_C0C26BC9CCEA0D01.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778e5a03378---lorowasuniretelasawovo.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/29a44758022b059312ccce34b086cab2/61014949270.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079b765e0745---pitos.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//73140595833.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/giligifemizalesanolowopuf.pdfIn PDF document text
    • https://asi-filter.pl/files/file/kivosazakowugaratuvefaja.pdfIn PDF document text
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/37270063911.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/wedunukesenalov.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/77924438689.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5c1d971ba0bb74575835386572376e4d/likejigolovelix.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/48102698169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=cat+c32+marine+engine+specsPDF 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_off0000c953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC953 10876 bytes
SHA-256: 4413b7d6169938dfad3820faec5bb2c3cfb9adde4db210cd06ba11c3de98f965
font_01_sfnt_off0000e282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE282 17772 bytes
SHA-256: 8a6c357dd984d17be711240bedcb1d2a7b2d7e13bbcaf28a8225eadd098a4cc6
font_02_sfnt_off0001110d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.