Malicious PDF — malware analysis report

Static analysis result for SHA-256 56714def4556f081…

MALICIOUS

PDF

76.5 KB Created: 2020-11-27 06:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c7cf511a527cecc4b84b3e60effa5fc4 SHA-1: d2f846b5b77bd9c4d5d7a2f00ab5de3a1c64bd63 SHA-256: 56714def4556f0811b934c1c309e128806823601db8799ca080edc1ab7bac945
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://trafffe.ru/strik?utm_term=bright+house+networks+st+petersburg+fl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5f8b662383915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5f920632c18aa.pdfIn PDF document text
    • https://zumofimuletoxol.weebly.com/uploads/1/3/4/0/134018509/lezolubameja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5f984733d0d04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5fa425e7058b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_5fa1a8df13981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5f918ca353dcf.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/6ea22653-8c63-4a59-b017-3d0c4414c221/incisal_guide_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a973c3fd-df46-42cb-adc9-9fba12301032/drastic_ds_emulator_apk_mediafire.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/zurawotoxikejelo.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/zizufoburowis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b26cccaa-6390-4e24-8a40-d84814053f0a/96502809449.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/egotistic_mamamoo_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f75061-5ea4-40d6-83fa-6bc87cab78e1/realm_grinder_all_trophies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272628b5-926e-447c-817a-e741c3767e34/18535808484.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 7

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_off0000eb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 5300 bytes
SHA-256: c524602007169d1b5a1815ffaa83d6faa5db39a1796a838c1c396a04b07ed4e1
font_01_sfnt_off0000fd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7B 11924 bytes
SHA-256: 4b8cf438d3b0149f4346558fa3a1974105962e650aeea6785e461e3d1db6fb12

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