Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f60430f8d52e886…

MALICIOUS

PDF

92.5 KB Created: 2021-08-13 12:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 6332ca422f45afafe4b4ee67c53bd61f SHA-1: bb84513032ebc2d1bb75b221a8d86de416fdf91a SHA-256: 2f60430f8d52e886df3ecc8615378fd6e85e971efc550a2731b6b2834281f055
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://cmoretv.com/userfiles/xokoravojivapovamelaze.pdf In PDF document text
    • http://sedaciesupravy.sk/media/file/83572703315.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/95898846999.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/c7daaec7047f4595e7ee9126c23a74a4/32337422618.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/34375049133.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/losepodisumubalixogimotu.pdfIn PDF document text
    • http://northcity.rs/slike/files/1744484400.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4c9fefe77bb5a9009b2bc9c904986ae6/60005741203.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af751a3fe3b---zimezexadamusolakojuwa.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/pawuwugiduvaxiwigobef.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2802bf679---polemovoxat.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/lijurubusepupiza.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/nadonipuxanu.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/88470087081.pdfIn PDF document text
    • http://dzbnf.com/upload/file///75899021847.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/909961d5c2f42df470ae2c1e0cda53ad/fovafigipudus.pdfIn PDF document text
    • http://hydrem.ru/images/file/41282096914.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607eae5571967---viretopinibetu.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/2a77c62326ff9dffec934bec90e314fc/lezus.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/bowiturexewezazaduruximu.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/3c50171e9220dd3f4d5f3f78f8755521/rarupawexufibopuxu.pdfIn PDF document text
    • http://bdn10.cz/files/file/22940898354.pdfIn PDF document text
    • http://bwc.lt/i/pusevibukujewijosofe.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/6kpmivtsugd6m2sv85e3qgssqu/jivinewonose.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/mikulodatixadajivinan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dieta+cetogenica+menu+semanal+pdf+chilePDF 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_off000101d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 11068 bytes
SHA-256: f5b8ab2d32438da46cd4731a9d092309c318500b9a52fd4a70fa9ea0eae30b9a
font_01_sfnt_off00011b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3A 18724 bytes
SHA-256: 87b6351f0a13fd426d43fe993da72f3e0c3812e9cc0ac63428ade674a0ea0db7
font_02_sfnt_off00014ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1