Malicious PDF — malware analysis report

Static analysis result for SHA-256 2daf47a7e8ec50b2…

MALICIOUS

PDF

87.1 KB Created: 2021-06-30 17:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 723454586ec34fcc152ee64cdae762b5 SHA-1: 86dae4e4d8dd16acac7be842631f7086fd97104c SHA-256: 2daf47a7e8ec50b25e9e04c7a2a045f1de958d07e0fdaf61323444aae874e12a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading further malware. While no scripts were directly extracted, the PDF structure and link farm heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/d33ff331ac429b91adeb3b26974dca4b/dorel.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/4oteogkthnkomv7prkqdetv165/segenilajiwabovinezufa.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f14ac3fed---jiturojegeturaxebufalawi.pdf
    • https://sgotomotiv.org/upload/files/milanobeb.pdf
    • http://samuiluxurytravel.com/Uploads/file/23270814551.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ac9fd4df1---kanujipokoraloli.pdf
    • http://grupposcorcia.it/userfiles/files/47262250170.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/f8806b37757b87394afbd305fd1c1e36/divumimuxivowitar.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c03330f9ef---jonaxeroxiji.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c64a473587---49159251566.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfae178208---27635278657.pdf
    • https://apsco.ly/userfiles/files/gobazavonifujibavaxane.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607193802f362---dititasixekikurixigi.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa7822d354---zigukaweda.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8713ac3604---70681277783.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/a345333a74e0e51f55256ce026d5be0a/88194034922.pdf
    • http://glotecgh.com/upload/editor/file/15430142241.pdf
    • https://egca.fr/userfiles/file/34934027485.pdf
    • http://szpital-sulecin.pl/images/fckfiles/file/7274068006.pdf
    • http://cateringkieuan.com/uploads/userfiles/file/binigufugota.pdf
    • http://recrute.fr/files/files/80011552101.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608676759cfc8---tenobivalovanutuwud.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/596a44723ff73b059fb96fc70d8baccf/siwowaniligavebametexake.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=gseb+social+science+textbook+class+10
    • 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_off0000f247.bin
620f8966a32a8d8c208c188115b90bc187f19eafc4270a93ffc202defe6c415f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 17080 bytes
font_01_sfnt_off00011e8c.bin
6344269bc6666bf6387528e1842e4f6b9054227c94a1dbe30e8a3115cfb6e62f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8C 10668 bytes
font_02_sfnt_off00013732.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13732 16792 bytes