Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3c37a718b25dba…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 22:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b830e5fac9594526bf1a27e5853ac035 SHA-1: d187795ef6fa4180d1367afa6127cd20b60e260d SHA-256: 0d3c37a718b25dba20d9e25d0efd91ee930afc00f99ece301c1ff0011c7ded2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The file contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://irlanc.ru/uplcv?utm_term=formulaire+procuration+banque+postale+pdf PDF link annotation
    • http://busangh.com/attfile/fckimg/file///20210614174839_927683052.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/78568980210.pdfIn PDF document text
    • http://ashioke.com/images/library/File/vupoxebavegidipukiduza.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf950a3abf0---95995365279.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/lakawevafoziditiranuv.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/69359990465.pdfIn PDF document text
    • https://shidoremicrosys.com/media/45693550074.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/39649f37fd85e1a0b50381ef476d80d6/83640510872.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/87923614248.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/wuzoxinopupezulik.pdfIn PDF document text
    • http://lhs1965.com/clients/880801/File/57701894866.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b73064a17---95225555037.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904b19a50f9---xazabazedaxawezefa.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/55413898014.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b3762ab58c8---75486190484.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/eb26e4280b6d043152e4a7b4426bb121/tibufosuxovofuwojala.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/757cb57703cff61e7008ce993ed513e3/sokudibaxuwo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/12f3fb55c1574315fabb69353a86fcba/46916113345.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/jipifowe.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8f34a4345---kitegupezekuvilodof.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/84aae27874220d6181a4e1f3a56bbe53/rexufupogamefirepofe.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/40054889184.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_off0000dc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 19556 bytes
SHA-256: ebab69e1137bf772533dde073e07db34ed328a5b3139460da9217394616a7529
font_02_sfnt_off000125fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FD 11144 bytes
SHA-256: 52b7f4779e4a89fa0344e3e430ab17b4c90488ef98923725410f2eb42024244a

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