Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6a0f01175cc03a…

MALICIOUS

PDF

67.7 KB Created: 2021-06-13 07:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d6cc4fbacfdd18072f113e879dfc12d9 SHA-1: ad7b1d40ccef537f1c056a7cb78fc8d49cd20f5e SHA-256: 8c6a0f01175cc03ab2f5a061006e610e639ead72c39eca2e67ee5f7cb27b7d40
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://oniceh.ru/pbw?utm_term=electricity+and+electromagnetism+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448731/normal_6039ed8a85d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497078/normal_60beaa1e508ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475382/normal_6063eb90ca5c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_60c15ce9ad2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_603ba9957853f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372384/normal_5ff26257c344c.pdfIn PDF document text
    • https://resodapiperuxa.weebly.com/uploads/1/3/1/4/131407292/dimelekavewux.pdfIn PDF document text
    • https://depazazivika.weebly.com/uploads/1/3/4/6/134697987/dejit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_60235faabc0af.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/dbdbe4fb-0c74-4b88-a890-04a1ba49183b/dixijifaxajukebemefeso.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/f/greek_bible_with_english_translation.pdfIn PDF document text
    • http://pevozowo.pbworks.com/w/file/fetch/144875586/78130315545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412b2be6-79e6-403c-b1d1-fb0e3b8c6e46/rozap.pdfIn PDF document text
    • http://daridameku.pbworks.com/w/file/fetch/144640149/wave_warrior_sonic_exe_1_light_version.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/145026183/gta_vice_city_extreme_bangla_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a2e93f9-6d34-449f-b65b-37c9f8d3b07a/bavupeboxuto.pdfIn PDF document text
    • http://fowobok.pbworks.com/f/advanced_word_processing_skills_quizlet.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/w/file/fetch/144449736/deckel_fp1_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b488670-cdc1-4730-97e4-61a814e22fbf/soxinikuvon.pdfIn PDF document text
    • http://magobok.pbworks.com/w/file/fetch/145068690/demodepowuzajasuxis.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD44 5532 bytes
SHA-256: 5174cc3a48081e43b6f7772a92ec2eef44a00c30638bea1985d95ec5f7a4097e
font_01_sfnt_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 9872 bytes
SHA-256: e3f3d1607e534d96bdbb92b3d3d1a9b9242162872dbeb08c472227090a2781ca

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