Malicious PDF — malware analysis report

Static analysis result for SHA-256 302dcbaee070ce64…

MALICIOUS

PDF

81.7 KB Created: 2021-03-26 07:16:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5d68bde9814ed5aca2bbccc970f51290 SHA-1: 78bf7a1ee5fd85899a691fd25db19e7971688d3a SHA-256: 302dcbaee070ce64ded00242b75a9c44457f6361adbecfc5fef742916db31286
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, characteristic of link farms used to obscure malicious destinations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern. While no scripts were directly extracted, the presence of numerous external links suggests the document's primary function is to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=how+many+degrees+north+of+the+equator+is+the+tropic+of+cancer PDF link annotation
    • http://xorabawik.medianewsonline.com/free_booklet_creator_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_6035408c41daa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389354/normal_5ff87d16e9c64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445726/normal_60261e5dc6e91.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/bichdqu/mimisofibatojugitoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_6029092d42ab2.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/q7Et8ha/winky_lux_lipstick_target.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5fe5e7d39c6eb.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/JidiaZU/33975507053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_6041aeabb1e0d.pdfIn PDF document text
    • http://vumajuzatijerak.getenjoyment.net/periodontal_abscess_treatment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378165/normal_5ffa0f772cdd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_6027ae35e7834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_6039d33f1120d.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/arabic_language_course.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_6047c10b6c731.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/ggzVhe3/benejidowutan.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuputid/hgcRiaC/guided_root_chakra_meditation_script.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/para_que_sirve_la_moringa_con_guanabana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_600ef1467172a.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/iaMejgj/colors_tv_hd_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/iharvjf/jevejatiguta.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/pNlOGb4/adobe_sketchbook_mod_apk.pdfIn PDF document text
    • http://tarigutese.mygamesonline.org/bureaucracy_in_pakistan_kennedy_charles_h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_602d48848a806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFF 5816 bytes
SHA-256: 9e50294f11430e93cbea4763a894cf9a95eb4ed9fbe7980fcb53cc0d47b81ab0
font_01_sfnt_off00010eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB7 12904 bytes
SHA-256: 752ea4c083e0c9485b35c4f74a204dad6e6498c1af6a39e4c78c05da9f059851