Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04ea66ab4169998…

MALICIOUS

PDF

63.0 KB Created: 2020-12-17 07:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1e1ddccf887caa04cd18c042d467d785 SHA-1: 92f1af2de690e331f0293f6b62da392fc956ef32 SHA-256: c04ea66ab4169998155f455acea1dca1020a114a79f135236d6eac263eaba39a
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-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://traffking.ru/strik?utm_term=nyc+doe+stars+comment+codes PDF link annotation
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/wirokuwofubonoderax.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/feneno.pdfIn PDF document text
    • https://titobuvidotid.weebly.com/uploads/1/3/4/5/134598786/7541bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462992/normal_5fd91db1244c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mulerux/anime_drawing_books_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1139d0b-1125-4e68-aa4b-20fe842eefee/grover_percy_jackson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046557fb-42fd-441d-95fd-f35b1d2b449a/wow_classic_test_of_lore.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/sql_formatter_in_sql_server.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeefff3de5e49b52925c2/1606283010589/kixubojadunekuwoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1125a8-ad36-4660-8284-fde3771221b3/zupugujoxemuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233ab47d-f8fe-46b9-beae-b5056243e990/easter_bible_trivia_questions_and_answers_printable.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAE 4864 bytes
SHA-256: 9cb9da8c8521a628f2235f35466bfe6255d3a4e23cdc8c9843a0a0e9fa1f3c75
font_01_sfnt_off0000bf14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF14 10068 bytes
SHA-256: f76788f934819db2dfe5afd53454b8e8491f4d5b80318e3babc8f721b90531a2
font_02_sfnt_off0000e175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE175 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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