Malicious PDF — malware analysis report

Static analysis result for SHA-256 beafcedf412c3232…

MALICIOUS

PDF

70.7 KB Created: 2021-03-19 06:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 32ac8b4809928f8b391fa36fd9dae161 SHA-1: c85c4112380463e2720f23c987e6749ef863af65 SHA-256: beafcedf412c3232132d2dd91731247c23151571978d50d35b66c0e7ca24bfb5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://resalured.ru/award?keyword=braun+series+7+790cc+manual+pdf PDF link annotation
    • http://jojidasusesot.sportsontheweb.net/16247231905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460055/normal_5fd2261e1dc52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488130/normal_5fd61b831cc9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fcc24c3057cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_6026784433c9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5fe089d2e8ead.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/21432023007.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/bhcieia/remote_server_admin_tools_missing_windows_10.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/5497468374.pdfIn PDF document text
    • https://cdn.sqhk.co/juroniwubiji/iiriggd/adenoma_hipofisario_tratamiento.pdfIn PDF document text
    • http://raraveluwogevuw.mypressonline.com/95248881590.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/duligubolapatisujipapig.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/9a931313-14b8-43d4-bc06-03f1d18fad74/mamiya_rz67_lens_equivalent.pdfIn PDF document text
    • http://wenares.myartsonline.com/audiobook_dracula_bram_stoker.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/39828742478.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/how_to_relieve_piriformis_syndrome_pain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b0994d-34d9-43b0-ae39-555ad6c44ea7/learn_r_programming_in_1_day_complete_guide_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df4c511-d7ee-4371-a4b2-aba19e3d30e8/patricia_bragg_books.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/les_articles_partitifs_exercices.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/91302448090.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_off0000d536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD536 5728 bytes
SHA-256: 2b7d2ca808c094d0eac74328a27e95ffb9212ad89e5692b83751a6fe088c0914
font_01_sfnt_off0000e89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89A 10848 bytes
SHA-256: 456f7e922120fea3eb471a894b18d5f84cd429495b4380c0375ec8e4c57ae5d9

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