Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f6cbd5fbf57a19…

MALICIOUS

PDF

70.7 KB Created: 2020-11-20 08:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 220c9bd70ec535a9aeac373082c73542 SHA-1: 95c7bd23bb488021d84916a2e99d647760c12b43 SHA-256: f9f6cbd5fbf57a19e2726116d00fec69bff2283ab3a886e743937f8edbfcac75
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 0.9997

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://trafffe.ru/123?utm_term=heart+of+fear+location PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f8d3c767b797.pdfIn PDF document text
    • https://guzebiba.weebly.com/uploads/1/3/4/3/134368687/vemubidutalimokivaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f94a5701de62.pdfIn PDF document text
    • https://fiduvoxasugi.weebly.com/uploads/1/3/4/8/134856114/gilowowenufin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f923e77059b4.pdfIn PDF document text
    • https://vokudaminovisuz.weebly.com/uploads/1/3/4/4/134495340/6897179.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/sefiwegegagu/sodixaponetumivolarejese.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/98413259826.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/fesojesirivimunud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db67270-468c-4300-b6cb-1aaa024bbd7d/71998418859.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/monthly_calendar_planner_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/movevevodudijamavubifijiv.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_off0000c443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC443 4656 bytes
SHA-256: 49ebd17723c9bd7a8778107a4f682b71191e35b9550cdea0d470b05a9a959d40
font_01_sfnt_off0000d42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42B 10692 bytes
SHA-256: 2bdf5b548f6ab4f3d46f6df0f24324d0a1f2ef1682f28e8c3238cb1e31c0a623
font_02_sfnt_off0000f8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DE 16204 bytes
SHA-256: 3c260b720ba846d87de456033c05b94d326aa9f09b16dabc19f167f97f6ae321

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