Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3223bc503e71f78…

MALICIOUS

PDF

70.7 KB Created: 2020-12-21 17:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4d728368b4cb587f98b94cbbfe88c459 SHA-1: 9386c949c3ca963bd4dcf52b6cd960f679ff4cdf SHA-256: f3223bc503e71f78bfe8f7be1101415cfac8257a695ef2c0794edd772e514287
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO poisoning or link farm attacks to drive traffic to malicious sites. 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 it's designed to redirect users to potentially harmful content or download further payloads.

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://trafffi.ru/aws?utm_term=photo+batch+processing+software+free PDF link annotation
    • https://pakovabe.weebly.com/uploads/1/3/4/4/134442852/mimiliwuragexis_wovanamanoru_kogerimebo_befunotume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f9094a37b08b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f922f9b6b113.pdfIn PDF document text
    • https://zoxexalibefan.weebly.com/uploads/1/3/0/9/130969973/6540768.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/kozewuposoridil/fegorozosofi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d4acb3e0f577145d6ea/1606372683941/40373296037.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3bad5405d5340f33b4f5f/t/5fca8edf9f842a6728ba2385/1607110368336/sirope_de_savia_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/kiluluporu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136146ff-773d-432a-9a1e-f78b887a7e43/35809339804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91256088-96e6-4962-bc50-72b68289e067/minecraft_flash_games_2d.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/ram_expander_apk_no_root_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c388cd42-4534-441b-a2ab-0ad34d1f16fc/yorkie_rescue_texas_dallas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40151bb-7003-4c6a-a57b-113f235c4afc/xoxomulisisarisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04115c2a-7fe4-4c2d-b287-d8f5f1b70d8e/jorujowebajasidadowubewip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc791041a9b7f6479384afc/t/5fd0b9b626d54b3c06d95609/1607514550650/egypt_old_kingdom_middle_kingdom_new_kingdom.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_off0000c9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A3 5268 bytes
SHA-256: 3a49bdab9140b2b95753926b58ea56df0adb1a0b74bf08abe907bff31128f838
font_01_sfnt_off0000db92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB92 10716 bytes
SHA-256: a9f6ee5d403edfabcaa0383b2801a15d17bd9d18cc749af2b496f190ac36529d
font_02_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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