Malicious PDF — malware analysis report

Static analysis result for SHA-256 c633205efdbfb134…

MALICIOUS

PDF

72.0 KB Created: 2021-06-11 18:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7c8807ce3b8949ed2c1320fe9311cfe6 SHA-1: a7faf48b6d5b447a87d493eee2dd423f3fb5835d SHA-256: c633205efdbfb134297e310a5a4e7a79f67b86ded88e6cc1a4be7c60e9dcfd01
186 Risk Score

Malware Insights

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

This PDF file contains a link farm hosted on disposable domains, designed to redirect users to potentially malicious content. The primary URL, 'https://drafthe.ru/pbw?utm_term=minecraft+download+hack+free', suggests a lure for downloading game cheats, which is a common tactic for distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://drafthe.ru/pbw?utm_term=minecraft+download+hack+free PDF link annotation
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/xakebudebaluxixaturo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446937/normal_6024b563c5282.pdfIn PDF document text
    • https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/e3546.pdfIn PDF document text
    • https://tevuluzusat.weebly.com/uploads/1/3/5/3/135397550/munupipomeset_melegeselazese.pdfIn PDF document text
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/jegoxazunipowezela.pdfIn PDF document text
    • https://baxegirugono.weebly.com/uploads/1/3/5/3/135319521/6652028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_601b83d7203d7.pdfIn PDF document text
    • https://zezenezanovux.weebly.com/uploads/1/3/4/8/134888099/vurojam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa589eb9-e7ab-4527-8ab4-37dc2f7a1209/perfect_english_grammar_present_perfect_or_past_simple_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ecdc906-0318-471e-b200-ab6c0ab165fc/44706821733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7bc060-2cb7-4d9c-96d3-628c7e632a00/jonudawalukiwez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77767929-8894-4be5-a708-a6fb07bb0256/cuaderno_para_aprender_las_tablas_de_multiplicar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cab01a5-f581-4899-8912-580312c38e10/kenwood_dpx501bt_delete_bluetooth_device.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fdd13f-6d8d-4516-b4ab-f9f576d61de5/sennheiser_ew_100_g4-ci1_wireless_guitar_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b23c16d-7b16-4f64-bade-2ce34aacc71a/xumida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ab3244-e3a8-4943-9256-ee1c28573cee/kesezitik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efc383a-bc39-4382-a1e4-8fff1e641d30/56291723167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c378f45a-1af7-4072-99af-3a9e2cdfe2fa/loziropurosobebewex.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 5092 bytes
SHA-256: 9a838d097c11c7a41bae2e0a4dd50b9083ff18a2a5aed1756a2621d0a8e51285
font_01_sfnt_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 10040 bytes
SHA-256: 09e623caaf21eb8bf451c84d304d810dd225219e46132d3340836944edae529e