Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac3c232378f1984…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 09:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: beff209a1b235e93c087194c3ad8aac2 SHA-1: dda6629cf087d11868fc8746ecec192d38e23bae SHA-256: 2ac3c232378f1984ce9ff21ec7ecf75371b5969f0e238b47cbb0f880e82cf219
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. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate the file's primary purpose is to redirect users to malicious external content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=age+related+hyperopia
    • http://www.clc-engineering.com/siteuploads/editorimg/file/24188214262.pdf
    • https://aawyx.com/sites/default/imageuser/file/85677059546.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072e44e8d8f3---lakenokerom.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/afcc7e8d4a2df617fe6e9f6aaaa7428b/kiwiritirejabu.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/90159412041.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c40e9b470b8f76eb3a9968c60630d56c/vurazobazuzasuzifi.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a355837903---vitiram.pdf
    • https://invest.pl/userfiles/file/89064563458.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c988fc5f28c---62197886281.pdf
    • http://myredm.ru/uploads/file/movujenunuruwowobenamafe.pdf
    • https://scheidungsrecht-best.de/userfiles/file/74788724443.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca416b2a86---walasezikimuxulenala.pdf
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/87407337776.pdf
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/89072398330.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607386a8f35d7---kijuduvetix.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3a2d5e83957c1c9c5cd2e205080aa3b6/sekituwutarowa.pdf
    • http://www.toeterloeh44.de/files/60988090798.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0c1551665510d1ddca5c302e171d5876/43038332551.pdf
    • http://andrelandberg.com/userfiles/file/kesugapasolepugisabefafuk.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/48ac9755c29d67c2b128543602a44a37/39256147548.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/2bade995747e46ecc9c18b0508a3a8fb/melot.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0911eb11cc---99627756027.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb09.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 16792 bytes
font_01_sfnt_off0001031b.bin
cc87be47b7b86ae6899381927585a94823dde54c5f99f8e9166beacfb6e5b3a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1031B 18764 bytes
font_02_sfnt_off000133ab.bin
abcd3783ee633ccf4b141be1f977d26e009a8c81c4fe489f8ee9d10232395e34
pdf-font-stream PDF embedded font (sfnt) at offset 0x133AB 10492 bytes