Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fa5f923ecc2ee6…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 03:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a74e537971b16980b9af8c37f439b84b SHA-1: d66f656c5f96e1923190590bb19900cadbe422b8 SHA-256: f8fa5f923ecc2ee667d25617ce9c3cd8de958c898aa211f5e56ea3ac086cd323
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that masquerades as a search result for cleaning instructions, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=cooks+coffee+maker+cleaning+instructions+14+cup PDF link annotation
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • http://doordash.fun/quantum_mechanics_500_problems_withncrli.pdfIn PDF document text
    • http://fruitslope.online/war_of_the_worlds_1953_blu_ray_amazonf96oe.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/zaxuloxedu/9P7TmmM/flaming_skull_wallpaper_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/zapoboveje/cihicji/94511912452.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/BHzlkjd/pocket_warfare_kingdoms_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/hhf7Pij/jazz_super_mega_internet_offer.pdfIn PDF document text
    • https://cdn.sqhk.co/sisowufabo/Bifjfjb/33835089468.pdfIn PDF document text
    • http://all-gopro.com/63463052014ni3d0.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/eEBct0w/sportsmax_live_streaming_cricket.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/9d3404f4-eff4-4ffc-a1dc-561871aa1eb6/digitech_jamman_solo_xt_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4816f292-08d2-477e-a34d-a252c1413c46/jukevabumavutoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d25a4d56-1f4b-4438-a2f7-9a359654f3b5/65800086519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb379aa-251e-4095-ad4f-181730d7bb06/when_you_wish_upon_a_star_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced9b915-04b0-40cd-9d33-7c3eabb74530/35553240509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1eb8e2e-3081-4d91-96d4-0c8fd0b5b15a/47156950600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ee092a7-bb92-4b1c-bae5-e5889645a369/how_to_turn_on_armitron_pro_fit_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6740a395-df18-4509-be7a-d1e631ae8204/overlord_light_novel_volume_17_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369ad1ae-d707-4dae-9359-e51ba67f8e21/troy_bilt_pony_tiller_honda_engine.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_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 5444 bytes
SHA-256: 09f56ec9ec0887e0c9369ef7e3520e891db3c3e9b540af791b398e3ba0cde9b4
font_01_sfnt_off0001057a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057A 10648 bytes
SHA-256: 33b27f9137074aa5ce96fae573a73cbae752198361b8be49504a25191e14a63a

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