Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bff62d43704f19…

MALICIOUS

PDF

85.8 KB Created: 2021-04-25 23:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f7341a4bf8ed2fa3c0a0ad9e30b5925b SHA-1: 9e9f2282d6014c7991f89d9702c35ec0ed741969 SHA-256: 60bff62d43704f19f69d31b2e15b5b7bf2cf6e4d5672b3d9fd9408927164c26e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://seumenha.ru/strik?utm_term=volca+sample+2+pages PDF link annotation
    • https://cdn.sqhk.co/pegipoveridi/e7zShc6/mor_sansar_ma_cg_song_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/jbhfp4R/24098332006.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/janojetig.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/zabexulatusix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0011a019-502c-49b8-904a-f4e473ff0d30/ikea_malm_king_bed_with_storage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c69ae71-afe5-48a6-aedd-5cbee37bb28a/lg_440g_specs.pdfIn PDF document text
    • http://setovoj.onlinewebshop.net/zimivifo.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_679fc8091ef2496b854e2e502fca561f.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_079d83d97a09456e98a818bf1a690ae2.pdf?index=trueIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_4ee5c7118aea4fd68932b053db5d35f9.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_36fe0a429b9b4753adbe58844df859ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/digestive_system_case_study_peptic_ulcer.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_a5e5fe436d4c4b54a6b16a6e78e68d30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/kurek.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 3056 bytes
SHA-256: 89aa5c56e824385dbe51513af8aad99091e56eab8840419b3f233e70ff86b370
font_01_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 4808 bytes
SHA-256: c3be50d87972e8a6d5284928bf21d05a74582437ed8165811d80f98a4ad39e6a
font_02_sfnt_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 11200 bytes
SHA-256: 372e29cab97cc54dbb9dfd5e7cedf15b197c550c11d5105a328fce6d9ee20816
font_03_sfnt_off000126a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A9 16080 bytes
SHA-256: d7c0313d84b709fe8a6a90baca56b34c20eeda1db47cffc02c31991c89a68c0d
font_04_sfnt_off00013b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3