Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ada9cd903c40f9f…

MALICIOUS

PDF

70.5 KB Created: 2021-03-06 00:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 087398e264814d763e5da0a256744754 SHA-1: 4f0e85c37ed72a3d67c3e880121c1d7f2b6a507c SHA-256: 7ada9cd903c40f9fc9a534677101cec344794b7368c023d7ac2c8cf3e6ba0250
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary link pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to games, suggesting a lure to attract users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://jumiwimov.ru/wix?keyword=1v1+lol+just+build+unblocked+66 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425726/normal_6022999176500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_600be799b9784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_600fdcac0d9bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_60187882e1c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425760/normal_603d36861e809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fd64ad5e9044.pdfIn PDF document text
    • https://kuwewukes.weebly.com/uploads/1/3/1/6/131636575/2112959.pdfIn PDF document text
    • https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/9429042.pdfIn PDF document text
    • https://sulunekuzesafap.weebly.com/uploads/1/3/1/4/131406846/7410677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_603e217bafeb5.pdfIn PDF document text
    • https://vemubofopelo.weebly.com/uploads/1/3/0/7/130776521/217ea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466165/normal_601905fc686a0.pdfIn PDF document text
    • https://roloruvibufezer.weebly.com/uploads/1/3/1/4/131410818/detal.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/5b04b1d7-36f7-4260-adab-032a5971a008/sundance_optima_880_series_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582ed6a5-f3ba-45c0-88d6-a0ddeb15b4c9/jojusoporebor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cdae935-8072-428c-92a9-f4bbfe3ab0ae/why_do_babies_make_sad_faces.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bf1c09-dd1f-447a-820b-c62dc85130d4/79983233401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd82848d-210a-4b94-b637-cb5c71c1294c/hp_4500_print_cartridge_missing_or_not_detected.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c344b2-a559-4d0a-8a56-2a17c6a6fd2d/zozumegubutoxekubisaxexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece6209d-03b7-4d33-aad5-688ca553462a/drz400_factory_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9043d6e-1279-422f-8367-baedccb1f576/bram_stokers_dracula_movie_castle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2005fd72-385d-4898-8ef8-7d43e7355be0/1023089575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabd27e6-249b-425c-869a-b741e9b21856/1849734359.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_off0000d8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B3 5076 bytes
SHA-256: 8719f1573ac42fd81b71840399af2b9c08fe834f28252f540bc85d8326d591b6
font_01_sfnt_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 10148 bytes
SHA-256: 19295ec69a45a4ac2fa204e1e7ad3d88e1df20cfdf9fc16679a4ba7f5331c66a

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