Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40e5f4b28521739…

MALICIOUS

PDF

82.7 KB Created: 2021-08-15 06:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fdf6ade3778233361cbd9fe9616f6ad8 SHA-1: 1899a27f68b1e6ed56acdc08aefe9ab06468424e SHA-256: d40e5f4b285217391e4b0c2b4666c909cc14aad82ce4f1dd19c7c600abb3aca5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of external URIs and link farms points towards an attempt to exploit user trust or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://chcial.ru/uplcv?utm_term=stihl+weed+eater+for+sale+south+africa PDF link annotation
    • http://niengrangchuyensau.com/upload/contentFile/file/foramadigakevaxesuvajivi.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/lemunuvevuxivujenamupi.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6df6bcdc8---ruwawuke.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/sibigalazitotamina.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/43602462120.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/55004751148.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/50677718999.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c127c6db---7679243890.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f27f88322---45907473294.pdfIn PDF document text
    • https://remini.hu/userfiles/file/26198838542.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abe1aa7028---jopuxowisunidapinajoxewi.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/3oq3of8ot1n1g6t9qscvd51tb0/sedimus.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081a5fae0b01---nusiwamodikafonasebog.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/sirune.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/61324251143.pdfIn PDF document text
    • http://atrsara.ir/resource/files/tomisa.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37d7c5f375---nalogu.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16100c792a19c5---wibesolemujox.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/tesupanaxazi.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/kexuwipalatadugojepajopal.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6833f2f8c---89218184843.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/depokifebukejumewunavar.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47a81352e3---busumirudopiragax.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_off0000da25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 18252 bytes
SHA-256: 56db2a8c16eb807edef39103b84382c351fedaac0bbb6fad758611d5d4e8a654
font_01_sfnt_off00010a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A61 10728 bytes
SHA-256: 41c659ea016fbddc6081a59d1ed6c3fa63708437fc2c16096b5012ad090f180d
font_02_sfnt_off0001233d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.