Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0d339ce7bcd627…

MALICIOUS

PDF

84.1 KB Created: 2021-07-03 19:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fd80e9a45829416888bb45aa245cca14 SHA-1: 6fc30d36fd5363618e70a886f47d96ea5ab7ba57 SHA-256: 2c0d339ce7bcd627d67b3095172e5130cb5506d648b7079c4ae6d6ec6b124477
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised websites, likely intended to trick the user into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests this tactic. The ML classifier and ClamAV detection confirm the malicious nature of the file, indicating it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/uplcv?utm_term=mp3+converter+video+to+audio PDF link annotation
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f332367ff---48867203093.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/tefenovafasuw.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/22415877224.pdfIn PDF document text
    • http://huntland.hu/upload/file/pakopunepegikobibazibos.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/83091665780.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/4f91625fbc58f48a0844151a2c227f36/vozagiwuxexenedaneg.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa8753f9f7---42763517630.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/bivuxezutib.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087702c41270---pumogolilasodafig.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/32209628696.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/82234478448.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc1a864eea.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/129ddf2c3c65a69c99f03bd90e0e5186/55527091753.pdfIn PDF document text
    • http://liffeyartefacts.com/fckimagefile/file/40901923760.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/tjcp0cef9fdtsq03msf4tl0ih3/vepoz.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/895e3a24788c9dc7e6753720712ef421/7376730063.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608218a54d0fc---dizarotixazejimixeno.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/ronutukobufebuxovexef.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7ce160e9---99700671320.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/xuzarupoxamujokokatawes.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6d011b7a0---rabawolorozelejizezakov.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_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 17388 bytes
SHA-256: e0b8ed4f69a2627288c73a9ce1d542c6e2048369611576f499b670d45550c150
font_01_sfnt_off00011153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001296a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296A 10624 bytes
SHA-256: f9dfecadab0f099bbd8693a0a9b7a32cbe12297a287bdf35fb05cd0d787c974a

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