Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d33b442e3d38fd…

MALICIOUS

PDF

74.0 KB Created: 2021-01-06 11:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 29992a4b5475b704664db6a6a24a378a SHA-1: ceb0f7ed51a650f9f2e00b66a1934087c9ba7bcd SHA-256: e3d33b442e3d38fd1da8a451c5e356085765df068a0d598fcdd145aef546f779
156 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, a technique often used for SEO link farming or to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to manipulate user navigation for potentially harmful purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafftec.ru/aws?utm_term=integrated+math+2+volume+2+textbook+answers PDF link annotation
    • https://molireju.weebly.com/uploads/1/3/4/6/134630509/80bb7f8b6c5da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fca4afba575e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473645/normal_5fa77e766ceb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5f9dc44dde001.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/d8d87296-7256-4c68-87b4-0feb0344dc26/16298569129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c72cf62-ca50-41c8-90ac-9c6feee6d4a9/bluetooth_pin_for_wii_u_pro_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76fbe1b5-f13f-4264-b89a-49ce1407d93d/fagomabodur.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/palo_verde_beetle_lodi.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/super_calculator_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/lagu_percaya_aku_metrolagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc2292c-e8c7-4d85-afd7-353831673b76/aau_jr_olympics_2020_cancelled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751dcd88-9b8a-4255-830b-2a00ba6e3e9d/56344916650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6475b067-d4af-4ca6-9991-e999db220d49/bike_jump_game.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/kadezejunopipowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7034451e-3940-41a3-8856-a985c666a308/how_to_beat_riddle_school_4_wikihow.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_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 5732 bytes
SHA-256: c1b97e59e75898ed54936f475b8cbfdf75ab85cc0463126f04aae37d70933944
font_01_sfnt_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 10708 bytes
SHA-256: 241055bff8b9570771be0d4466f85d4399dfb08d19b27e927bc67130d5cef82e

Open this report in the interactive analyzer, or submit your own file for analysis.