Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ddb042a5c6300a…

MALICIOUS

PDF

76.0 KB Created: 2021-03-26 10:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 315e51d3ab2821221e99252e7e9c186a SHA-1: a839542212ef3d1d9e6ce5ac87b0e3f9d0232056 SHA-256: 48ddb042a5c6300a3a997b5b668d82a091b41a2022a470b4c12532c9496b1615
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM' heuristic, indicating a likely attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous URLs suggests a phishing or malicious redirection attack pattern.

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 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://resalured.ru/123?utm_term=ryan+adams+songs PDF link annotation
    • https://cdn.sqhk.co/novozefox/Khagh7y/neo_scavenger_crafting_button.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/f4DvSpz/soda_dungeon_best_gold_farming_team.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/past_tenses_advanced_exercises.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/nasb_study_bible_download.pdfIn PDF document text
    • http://opensoda.pro/179838746pqae4.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/dWJGUig/ocean_survival_game_online.pdfIn PDF document text
    • http://xsale.trade/is_reg_262_requireddct3q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rulezowi.rf.gd/12486358922.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_36f903b2ede040978646d9f43ec0b366.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulagisi/glass_sword_victoria_aveyard.pdfIn PDF document text
    • http://fojeropiralamab.rf.gd/notes_on_caucasian_chalk_circle.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/sample_of_autobiography_about_myself.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/nudarar.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/59074232508.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_0f44bdd827804acc9345bcd9df2efecb.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 5128 bytes
SHA-256: 07d5d00595f00a43353d3e957a2a67ea7eb6e1cefdbd560b1bd4b8f72d4d7cee
font_01_sfnt_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 11112 bytes
SHA-256: 64af3fb987888487b0754a7b4b7aa90db4ef66aab30fc2ab0e4e871a3b79e063

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