Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8a1a08c09a3fa2c…

MALICIOUS

PDF

84.6 KB Created: 2021-03-05 10:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ca8c2038444e017aff11729d9bc0700e SHA-1: be7c2845d31ad09e6b74a7ecc3163af7a6f0c0d3 SHA-256: b8a1a08c09a3fa2c93f10c33d1ca35c4e0060c3dc9a3e257a3f2da8b1c8e3252
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to children's books, directing users to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/123?utm_term=what+are+the+best+books+for+5+year+olds PDF link annotation
    • https://cdn.sqhk.co/feziwetesene/Egegfgd/9206302311.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/FgeV2hN/free_printable_usgs_topo_maps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453575/normal_5ff3b44551c02.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/0hhibgh/32555279337.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/aIVANip/ai_based_chatbot_using_python.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5feee2eda2098.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/hibhihi/gsmarena_samsung_s20_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470535/normal_6007ae33318c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5fe7748ee8fe5.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/BMAjbBn/95644436858.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://s3.amazonaws.com/xamapebonijos/banomoya_amapiano_remix_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd43a7a1-3dbe-495c-bd3b-b9806b1200c6/axe_pomade_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb5266e-dab4-4b3e-a6d0-57a0d7261c49/is_white_fang_a_good_skateboard_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a565d397-263b-4446-b8d7-50833bb28171/liftmaster_security_2.0_remote_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a2bd09-8d4e-42f6-b883-471df0598ded/80667561291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d33b9c5-36fd-4af6-8e59-3c20bf3b6271/what_is_an_outbreak_in_pandemic_game.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/carrying_you_guitar_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61efcc51-7e38-4930-9f26-84a27f8025ab/kapajigop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e809c4f-873b-40ed-a97f-a374795737ed/31741436139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81f8fdf-0192-469b-b3ec-53566344f6ae/16693988711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/181ba093-498f-4ec6-a878-ac94d3efb1d4/public_speaking_lesson_plans.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 5072 bytes
SHA-256: 8fdd034e7e115cc24db41cc300d9c173e0dd07f2cfee592b06dddc761c0b9654
font_01_sfnt_off000112df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DF 10328 bytes
SHA-256: d0ce4f0037e303c01257ff53765a4bfcceca8ef0da5ee3f2a4c8481c2623dbc1
font_02_sfnt_off00013658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13658 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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