Malicious PDF — malware analysis report

Static analysis result for SHA-256 01176103bf986318…

MALICIOUS

PDF

81.4 KB Created: 2021-06-26 10:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e2e8eed2bca2916203bf9e0667f452d SHA-1: 2ff709d2ed4f838b48f00400921da0ae6c2992ab SHA-256: 01176103bf9863188c7f2dfb66c2d9c9d293667f2ba3d80609d41a378a7095f4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160adbb3d6f15b---kexowapisavapozawulu.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/1ed40ef7042e12f5ee19c68eb14e1563/xufetezotup.pdf
    • https://rzfmuhasebe.com/userfiles/file/86735093909.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d05920f629856bd096a5880fc184cc35/fafidusal.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/d8718e1b6bd0bf49422c54e517cba8f8/jajid.pdf
    • https://astefin.ro/ckfinder/userfiles/files/64134986846.pdf
    • http://mkconline.com/landmark/ckfinder/userfiles/files/boguvosebojulifibo.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1126418e1---53062203600.pdf
    • https://tiguan-wiki.ru/file/41039434126.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160987f1936d09---siwonovafirosolef.pdf
    • http://alphasigmaoverseas.com/userfiles/file/zajegewusazujazo.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/820b81512480c0c63f3089cd1ef31a62/86102560648.pdf
    • https://copab.tn/216mag.svn/uploads/files/xobuwimojonefimozadi.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/9089504b03f8046caeaf3a88db372485/26849483309.pdf
    • http://supermarketdv.ru/files/file/70915163617.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608735e47d9a1---pinuparanavuwutumoj.pdf
    • http://biirbeh.mn/images/content/file/tunifa.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/r9cnev32m0qo8uti9fc6vsiac6/torinozizuri.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/vsqr554sel1pb6ul2mb6vu2hpv/sumoxagigotesafofo.pdf
    • http://yilip.net/userData/board/file/lefogawetuso.pdf
    • http://manixcnc.com/ckupload/files/durumijosorovuvagaledag.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/d65b4fa709cc6d550e3f082e1d6c8747/89167931927.pdf
    • http://greathorserider.com/ckfinder/userfiles/files/91303733774.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088e08407f01---lubelazizenojisol.pdf
    • https://go2germany.ru/files/file/61081701080.pdf
    • https://imgfil.com/1ivbzihttps://imgfil
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=theory+of+machines+rs+khurmi+solution+manual
    • 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_off0000d894.bin
2d079ec5009bac21c2fa3f86e9bbc3bdcd91028ff7a8566ce5c82b222601037a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD894 18116 bytes
font_01_sfnt_off000106b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 16792 bytes
font_02_sfnt_off00011ec9.bin
1bc345a29ecd4b0bd7852fcfb8fca4ebbeeed361cbe436feef787bb73039c17b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC9 10868 bytes