Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3a230ea49532b5…

MALICIOUS

PDF

74.8 KB Created: 2021-05-20 23:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 712faec9b5bb33338dd8a0ee6ae1caa8 SHA-1: 1f15a6f551cb2ad999b401c3bcde62905db3dd4e SHA-256: 5c3a230ea49532b5d8f6d58cc780367d49fa74135ba46c0dfb150238e1d4cf70
196 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jacksth.ru/strik?utm_term=fr+legends+mod+pack+new+cars PDF link annotation
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/govoji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446636/normal_5ffa874f999ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382429/normal_5fe11078e1000.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/rovazuw-zagaxojaji-jotad.pdfIn PDF document text
    • https://notolunezoxab.weebly.com/uploads/1/3/4/8/134846452/84b9f36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_605f96931b177.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5ff0490060a4f.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/50da34f7-39d3-47db-aa97-194ca0210ed1/47883347550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae980bc5-e05c-4c68-8109-5132db96a37e/german_english_grammar_book_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a752e59-20c3-4825-9ff2-7b49e64e7605/jakenulufuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56802747-3910-4944-89b0-2d296a5a9b77/how_do_you_freestyle_rap_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55cfd78-5cef-4c18-ae69-6745f7ad4682/how_to_clean_cabrio_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b66d3a96-aa56-4d02-a0fc-5b0e154c80c7/what_are_the_healthy_snacks_during_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2932a815-8939-4713-ae94-2d1e4b31a695/why_is_my_garmin_vivosmart_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0875e729-d4da-4b72-a404-b1210c2763ec/how_to_text_on_doro_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3ceafb-2853-4516-ad66-24d05d449260/what_factors_does_the_kinetic_energy_of_an_object_depend_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020afa5c-64b7-4441-b4c0-6830873e439c/13785253649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672bf5d3-fd36-4ea9-96d3-658aac78f37a/how_to_install_night_owl_camera_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74eb1db8-810b-46d9-87e3-1ec9fdf8e7b0/gidorokolosegimeru.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_off0000e478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE478 5504 bytes
SHA-256: e9b2ac1b4a0c61518350d58074b94e30e83d8abbf88ff14ff5aa8a7ae70b5b68
font_01_sfnt_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 11352 bytes
SHA-256: b56e83b9d88e5784244f128e8a9229208824229e3d1436b2e0b075d783791a49

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