Malicious PDF — malware analysis report

Static analysis result for SHA-256 72385304249466e0…

MALICIOUS

PDF

85.4 KB Created: 2021-09-03 23:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8d9060b09c174fe2ae2c77f6b2c8fff9 SHA-1: 29a1fec4c7f920507b303b0168dfb63bce692e99 SHA-256: 72385304249466e0775daa979080c2b67d153619b73356df0a6e1509a1b9bdad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the link farm nature points towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ketchas.ru/uplcv?utm_term=orlando+zip+code+map+pdf PDF link annotation
    • http://dobrasekacka.cz/userfiles/file/7853395582.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/2518246109.pdfIn PDF document text
    • http://hanifeugur.com/image/files/gosaxusegumutoz.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707151618e2---doxokakoxesazup.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/gedazavasivibitapilez.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8aa1aa44a---77158389525.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086f23aef85d---tuvuwujotupo.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/e347cd5342d59bf22eaaed2143916913/83188425715.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea113c04a8---55471027253.pdfIn PDF document text
    • http://biosite.ru/images/news/file/dipiso.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/tt6r3277014pln4b7m5e022r83/86634189380.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/050330164258.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/xemoxe.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents//files/99095754088.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/0598b23c313de2d845f188c970fadb54/wimemagunonifokexikafup.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/ropaludukokepufepal.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/82637033818.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/9896548434.pdfIn PDF document text
    • https://pellevah.com/upload/files/kadulexe.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa9a808093---24856576388.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/82874087966.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/84594503190.pdfIn PDF document text
    • http://agro-partner.com/Image/files/rukebanonosulopuxife.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/66659451820.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/5070254822.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821ec128285---dujegigiwogudosud.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_off0000e868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 18224 bytes
SHA-256: 10d5167b01a975556b877b16e117d6f340a1c49418417c6f186fe4ff98699823
font_01_sfnt_off000117bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BB 10600 bytes
SHA-256: 7945eed471b4ab7e8e0baca0967ccaf091a60e34be6216735d8d3e0bca2bcbc1
font_02_sfnt_off00012fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1