Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a32de4cb20b1fd…

MALICIOUS

PDF

88.8 KB Created: 2021-09-04 00:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0698ff62e3d5013b445b30816b931718 SHA-1: 67eb67ab46947d283c7e455f22147f6d5f2597be SHA-256: 74a32de4cb20b1fd711712c20ab930602cd4848625efea2baaac36557a0468cd
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs lead to potentially compromised sites, which are likely used to host malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/adba61a76679c077ee192877da90f8fc/86130589359.pdf In PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/bf506a94a5c2b2af8ed4e0c7de6803ea/38689049577.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/josubiw.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/sopiwivojefo.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611d4cf65fbaf---48328344610.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/88299551260.pdfIn PDF document text
    • http://betentour.com/sites/default/files/file/56697778981.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076518676d97---kanedizat.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f561e5268---bovofefenakupaba.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/70685661320.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/966363f98e753f2c7f0123c7d3f25f2e/40058820328.pdfIn PDF document text
    • http://zae.me/datafiles/file/22111403231.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/benowedexisukotov.pdfIn PDF document text
    • https://eternalbliss.net/file/71962080370.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/vatabajosujitakoz.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a1f60ab5a---4041440629.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3d992b3be---lexufumidaxafiko.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/83181595869.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c2e025e9c---pugiwexumikazugokedi.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/piwupapim.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/23191250974.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210702020639.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=best+wattpad+stories+tagalog+pdfPDF 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_off0000f707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 17684 bytes
SHA-256: c215a9a3ef72edf828ca808816a4f8d28437f3aa3277823a5a03f22a0667cd9b
font_01_sfnt_off00012545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12545 10708 bytes
SHA-256: 221535be60ac82d454ebbebfbf0c5e2d6ad8f8b152c486f1e2e17fdc37d0c7d8
font_02_sfnt_off00013ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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