Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fbab358348a659…

MALICIOUS

PDF

75.7 KB Created: 2021-04-25 20:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fb01107c9b7a0a533b8af402f0499e45 SHA-1: a2024cede01a91e2f09eab45a85d5f76b6a31301 SHA-256: f0fbab358348a659b925ce990b5234e356e8fcabb5763c609b6eb3a9b2a32fe7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous external URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or malware distribution attempt.

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 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://maypoin.ru/strik?utm_term=how+to+use+hamilton+beach+digital+steamer PDF link annotation
    • http://vojemodipu.sportsontheweb.net/blockchain_technology_in_real_estate.pdfIn PDF document text
    • http://golulim.iblogger.org/basics_of_computer_languages.pdfIn PDF document text
    • http://ratedewu.scienceontheweb.net/47887944701.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdfIn PDF document text
    • http://pupigojoniru.mypressonline.com/zurotujixuxazeta.pdfIn PDF document text
    • http://kokilubowo.22web.org/86250114403.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botiditab.rf.gd/statistics_probability_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3b22c14-957d-453a-acdf-2623357243ab/mr_coffee_12_cup_coffee_maker_stopped_working.pdfIn PDF document text
    • http://momodew.epizy.com/graphic_resume_template_word.pdfIn PDF document text
    • http://famekuputoda.myartsonline.com/12413170297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54aefa0a-202c-4e4c-b094-fc55a737f8ff/fapafimimuputizime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e45fde-8030-41c0-884d-6a236ce9427c/navien_240_error_code_e001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232896ac-a157-4063-9199-2d89393fc7e0/97821918530.pdfIn PDF document text
    • http://vegazomu.epizy.com/40886403201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4e01a9-3341-4d65-b201-fba88cc983a6/sabemunuvikumolezutetag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49129c0f-3d87-47b0-ad4e-f69bb3f58f25/how_i_became_a_pirate_by_melinda_long.pdfIn PDF document text
    • http://furalepoju.rf.gd/lowiveme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ca384f-da84-4adf-b454-5ce18cdbb16b/specific_project_accounts_ratio_analysis_class_12.pdfIn PDF document text
    • http://vemirukediwugo.rf.gd/gukanivizasivagasovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b0471d-c789-46b2-ad4a-bb2b970370e7/65779653425.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 5544 bytes
SHA-256: 7fab6d070f44eed8b32ca64c99e5657cb6af5a17031943531f302326125e0b1c
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 12228 bytes
SHA-256: 801b2eea4ee549d14474c7b9e9384962d8f3213cf4170ad6cbac67d3f1abc72a

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