Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e702281bfc94a82…

MALICIOUS

PDF

74.2 KB Created: 2021-09-05 06:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9e5ec7c100758b9edb2a7a563af28d07 SHA-1: 88104d39a5469f0a34e11555ea585f88ce6751c2 SHA-256: 3e702281bfc94a828e2ef6e43b3a209c8ad53950aa643e621d4d3039bf6374b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://vaitinhdien.com/app/webroot/upload/files/wibubi.pdf In PDF document text
    • http://kahasat.cz/data/file/dexisenobitufubukibafapip.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/mironedaxa.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/zoliwikusakapikudomiligir.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/61684721878.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/034b9a3b29412c5fababa6ab75dd833f/lujexotatogok.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/i5v3p759mlh3d2khvpp5gbivm5/90084010305.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/10607515943.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/3b004b79d50be8a2e7f9efb48c2194b1/84364960718.pdfIn PDF document text
    • https://basisnomor.com/contents//files/gasiwememubi.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16cb58a9b---wevusesozekejew.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/320sp3ccke5ja23v9rcnmn0t7c/wufowelekodiwijote.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/21117197500.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/26554740341.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/88400422426.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/35167547838.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7494c2385a---29649043045.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog//file/47427894419.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/81697272804.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/zeditubaga.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f55736bfb0---zidilaguvuzu.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/lozovax.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/96252500759.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=protesis+para+perros+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_off0000bf81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 17444 bytes
SHA-256: 69058b1aed83f2de44faa29e04ff433f2a330b82df10648b1c80fbea9f37f3a4
font_02_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 10340 bytes
SHA-256: 502c0f1e5e7e648d2ec4fcfec66ea723e0044e154cd35d74a76287ac59c0d70f

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