Malicious PDF — malware analysis report

Static analysis result for SHA-256 23cfccac92adf017…

MALICIOUS

PDF

73.8 KB Created: 2020-11-13 18:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d72e3a197d8b777e84e0e2143443f1ba SHA-1: db9c720ff0b6fe926232f5f9f83578f67421d0fa SHA-256: 23cfccac92adf017ab426db43cc0ebcad1ae7c94ffa11059d21be88256623c5d
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=oscilador+puente+de+wien+ejercicios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415321/normal_5f9a4a022bd52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5f8e4e157859c.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/5ce718aa-2c7a-4fef-8c20-c111792e4230/wikaburazerol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb0c2c9-a098-4cb3-8325-796fda2c364b/at2020_usb_mic_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9930905-1a22-4afa-9946-58a7e7fd1b19/nike_blazer_sizing.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/dollar_general_handbook_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/52181587541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abe1b8a-1894-4b12-b108-1961879f2a13/define_thematic_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d296279f-96b5-4d41-87d4-8af3ea32b97e/42835361385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74960a7b-3b2a-44af-8258-9f908e52dd1b/tizijazomokelimomedom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a2af85-10ea-464d-bfa4-a7257c2cd9da/99135885914.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D2 5260 bytes
SHA-256: d59a9e0ff262cffd549171094fef41a17ec02a0fc0ded1ba4a9eacd041b785df
font_01_sfnt_off0000dbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD9 12304 bytes
SHA-256: cc9a393cc86735bf319b917c6110ff0ae457b452f8b3cb841cacc76cedb821c2
font_02_sfnt_off0001039e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039E 16112 bytes
SHA-256: 275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399

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