Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e58de53efc3839…

MALICIOUS

PDF

161.1 KB Created: 2020-11-13 23:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 50736857d0a1064ffa6de260ae6f8eab SHA-1: 68f0f0d69ea238b9b267ef64e7ca2810f1b08dde SHA-256: 48e58de53efc3839441018234f5dc44bf34a0d76aa65d51790b9f9614f056eaa
162 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 routes users through malicious redirector infrastructure and presents a deceptive download button. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/123?utm_term=2001+arctic+cat+500+4x4+service+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f8f8e4887a11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f96a1d825b22.pdfIn PDF document text
    • https://weropejo.weebly.com/uploads/1/3/4/3/134321986/435869.pdfIn PDF document text
    • https://seriraradekabas.weebly.com/uploads/1/3/4/0/134016679/vimoduworugumomiba.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/a2095f1e-7b77-40ef-bbf6-2c034b76e716/2732827622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934a543b-b71f-444d-91d9-a70d5b086c39/tuwowisujixojora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79c50b4-7630-4ac9-afb0-d008df187dc7/2006_bmw_5_series_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/89070925996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7327dc29-6ee9-440b-8e19-58b3bf7fa19d/55128696728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fed5bac-688b-45f8-96c5-007917afad9e/ktm_electric_dirt_bike_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8667d424-64ae-4312-baea-26c95cebd086/ninja_game_on_ps2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4e0a16-c798-4b7e-b494-30bd3d368d33/31887352266.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_off0002378e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2378E 5872 bytes
SHA-256: 022e6461d59b4081b34a3dd42e59e72851b901dff725ce9f7887d734a3701ddc
font_01_sfnt_off00024b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24B93 12980 bytes
SHA-256: 8ebca7694ad4cfb45c39cad8849c9a54e50c32f1d0752cc10b6af8e9798f0e75

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