Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0a3ea84b7f4126…

MALICIOUS

PDF

67.7 KB Created: 2020-12-02 23:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 362c25fd59eaacbb73a3ebc1a4eba960 SHA-1: bcc77a69b7f2e57ef8006b0bf1d60d41a56ff308 SHA-256: cc0a3ea84b7f4126ec5b9645fb2c9612a8841f921a1f8ccdf67bfbeac6464201
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 0.9998

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://traffine.ru/123?utm_term=kipp+nyc+school+calendar+2018-19 PDF link annotation
    • https://menikevolag.weebly.com/uploads/1/3/4/2/134234624/zadefaxovalikixuxep.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/413975e233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f93f0d6e55bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5fae42ffb6c27.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/ed8eab5d-38c9-46a1-9064-ec7ad07a1c33/mukajibabulotikax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4501856-834e-464e-a81d-92d772122a82/joboxozuvewijugezatel.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/android_mobile_update_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1571097f-55f4-4860-b363-2a0b3a9a8e0b/zilulit.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/dieta_de_los_trece_dias_de_angelica_maria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e078a04-fd43-467b-9667-8b014a297639/nazi_zombies_portable_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5502d4e-f0dd-447d-ba2b-0c7309e1229b/java_swing_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293f09e3-bc7f-434c-a014-6c9258f0d9e8/39990508261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d709598b-a81f-4939-a233-fbbb79800732/elements_of_newsworthiness.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_off0000caa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA9 5940 bytes
SHA-256: ce4f717dae815167284f4564461e2ece62f321bd656f58ce169b085612af3fac
font_01_sfnt_off0000def1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF1 10332 bytes
SHA-256: 1cede7a3210ee75f27c9b05282e596abbaf8ccc68ddacfb1af0405e01d084365

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