Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48e76e2eebebcf7…

MALICIOUS

PDF

75.0 KB Created: 2021-05-21 12:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 923ba608e175da6a634c5fdbad3917b3 SHA-1: c2b9a353998decee945df4318d2495cde38406ae SHA-256: f48e76e2eebebcf7432ad0aeeeedd09b33c7c962313fe07b289d531b229e2592
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=ford+fusion+repair+manual+pdf PDF link annotation
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/refofefovekow-kixolipokusu-xatosovik.pdfIn PDF document text
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/safokirel.pdfIn PDF document text
    • https://nanagupuwaxa.weebly.com/uploads/1/3/5/3/135322083/nuvorat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_5fe6a24aaf896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469643/normal_6002a8584da5c.pdfIn PDF document text
    • https://satataro.weebly.com/uploads/1/3/5/3/135350270/20ccf97f276d23d.pdfIn PDF document text
    • https://jepunitapo.weebly.com/uploads/1/3/1/0/131070437/127e55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_60175ad4144cd.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/mepigiwe_kulivakaguzoki_zimakuxa_dajuxipen.pdfIn PDF document text
    • https://xiwesawubofu.weebly.com/uploads/1/3/4/2/134265581/3135422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pilazi/35979978403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a46af7b-020e-4496-a4c3-1c914de19ea7/timely_door_frames_installation_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76657ac-4520-4afe-bffb-39706083d27f/dantes_inferno_game_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/56427956115.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/balancing_chemical_equations_worksheet_100_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/fenofak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e302b4ef-d9ad-4425-9e04-eabf4054db9b/what_does_temporary_employee_mean_in_business.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/88826960235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c692bc-6cac-46f1-8a68-18d5f961f24c/xulusefufatikezitaxumaxek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a19ff6-a9df-42f2-9d6c-7ae1d30e5d47/fender_super_champ_x2_head_used.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/25571941215.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/fubom.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_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 5144 bytes
SHA-256: 7a6129b131224fc45d1278e78f116c86f56f8001ba1b3b0d4629eb5ab92ef9a8
font_01_sfnt_off0000f974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF974 10800 bytes
SHA-256: 9feac3be1479b4f3f303951b8533a386f3c4932e3c1bbbe07253d4c92b296772

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