Malicious PDF — malware analysis report

Static analysis result for SHA-256 96aef8f00715cfaf…

MALICIOUS

PDF

76.3 KB Created: 2021-03-12 02:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 893e7cc9af1d6d19ba75126ca3dc17ae SHA-1: a4e9149a96fad4de4d7e9abb582318493603f127 SHA-256: 96aef8f00715cfafba7016683db1c889920ccdcf8321a3522f954ed6cbf575c9
66 Risk Score

Malware Insights

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

The ML classifier strongly indicates maliciousness. The PDF contains an embedded URI pointing to 'baarspo.ru', which is likely a malicious domain used for phishing or malware delivery. The document's structure and embedded links suggest it's part of a link farm designed to obscure the true destination, a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://baarspo.ru/wix?keyword=cross+examination+questions+for+child+custody PDF link annotation
    • http://sayfelengs.space/guiones_para_pastorelas_navideasnniy2.pdfIn PDF document text
    • http://metaleagle.ru/how_to_use_moho_occupational_therapyagm47.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/fexiwero.pdfIn PDF document text
    • http://my-favshoph.online/69723981868kqmd4.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/senatafobudizoxugen.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/RfgfigG/the_room_place_outlet_store.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/dlhdgic/front_license_plate_in_california.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/60058990053.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudolajuji.atwebpages.com/6437689876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4846f50e-a81a-41ee-b407-b5ae28542cc7/the_house_on_mango_street_themes_and_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb9c5be-1712-4e34-9d09-d45982235d10/is_panda_express_bad_for_you_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae145368-0aca-4ccb-91c6-719ddaa20ca2/sonic_sausage_breakfast_burrito_nutrition_info.pdfIn PDF document text
    • http://votarudiwutap.epizy.com/nora_roberts_hideaway_review.pdfIn PDF document text
    • http://bozumux.epizy.com/18808525995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41738883-51f8-4a65-b797-012e2c727caa/ji_packer_knowing_god_audiobook.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/annette_alvarez-peters_costco.pdfIn PDF document text
    • http://baxewape.myartsonline.com/tratat_de_chimie_anorganica.pdfIn PDF document text
    • http://wokoxut.epizy.com/childcare_act_74_of_1983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f166970f-ebfc-446a-adc5-079df17f5c8b/appareil_photo_nikon_coolpix_s220_prix.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_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 5460 bytes
SHA-256: 3fbea8f7de8748d308f4fa2047f06dfe2314b13e367abb844a9b7ef12d3e4f3a
font_01_sfnt_off0000fffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFB 10528 bytes
SHA-256: 7aebf89e78bf17a7e1e53dc1431eb362e189389a9901016743c8cec4f95a065c

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