Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6b2e59d0c25ef8…

MALICIOUS

PDF

100.9 KB Created: 2021-06-25 17:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 50f16496ade5dd434c00e48338c817ff SHA-1: 5184d7c91472c5747272832d6de84e2f39f0cc13 SHA-256: 0c6b2e59d0c25ef83faeb9b53054a2504c00ccf3d4e9f944ab55e394e633a1d1
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Numerous embedded URLs point to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://drafthe.ru/uplcv?utm_term=above+all+else+i+must+be+saved+lyrics PDF link annotation
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075180ae64c3---35440887393.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c400898485---66101285168.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b32fe7b3eda---73168236012.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/88cr3im670p2bm6lhpvke41q90/81811705934.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/3d56830ed9b8012f7015599df38cd04e/zikizijijagubedokelosudur.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a915429d8b4---71541051775.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608441a802d45---42850518018.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/42358450750.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9ef112f4c---tatatotozurawamem.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/lsl2m5novemg1k9ni1nohnhooa/kefewawekedebixixoz.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c25a487107d---28053527954.pdfIn PDF document text
    • http://crm333.com/documentos/file/gezikeb.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9dba1dd97---noxunulinemizari.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/janofufifubafumuloxerimaw.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1622540713.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/novexe.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/5814291232.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607447813c242---7474037393.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/a6methalqq9m0j14om9d408p8i/5708316106.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/3774bad98120d0313e6e10fa1252abf5/jemibusijinelevowu.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/31431626349.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/3050394368.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/44f099e35e51bc8400304284371495a3/visaladamupe.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_off00012ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE7 16808 bytes
SHA-256: 7e38ba5d7afd4952707913bfd47134b66447d1ba2f608e34e514eb75388eb008
font_01_sfnt_off0001565d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1565D 10828 bytes
SHA-256: fdc3db43d748fcb2882847eb3e85a0b698c4683df0d980202f088fdbf91cd9c5
font_02_sfnt_off00016f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1