Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f330c2449e768e…

MALICIOUS

PDF

78.0 KB Created: 2021-05-16 20:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0d27c48ea4431e84a5910270fec2f66e SHA-1: 23fa934e2b315faca243a16f0301a2b4b401b454 SHA-256: 39f330c2449e768e0606952941aa7b5de3132ba766367b63837a4f7f595c6d69
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/strik?utm_term=2013+dodge+charger+pursuit+tire+size PDF link annotation
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/9494732.pdfIn PDF document text
    • http://nujijaj.getenjoyment.net/71117752175.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/feridojubosalejezotiza.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/doctrina_del_calvinismo.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/wapuxubatudi.pdfIn PDF document text
    • https://bijararavi.weebly.com/uploads/1/3/4/5/134587429/3853793.pdfIn PDF document text
    • https://tozobaveje.weebly.com/uploads/1/3/7/5/137501006/ketuwutofa-xokizipudexuk-pabexudovonoj-fetubugati.pdfIn PDF document text
    • https://jevetokisavov.weebly.com/uploads/1/3/3/9/133997370/wenirejofoxizos_tajesowasu_lalexejevoluk.pdfIn PDF document text
    • http://gayerkan.com/joburopn5mbi.pdfIn PDF document text
    • http://vsspb.ru/956569398239gndk.pdfIn PDF document text
    • http://fovazewo.iblogger.org/jisazogutotoxedi.pdfIn PDF document text
    • http://fortysgjdk.fun/315584932438yp52.pdfIn PDF document text
    • http://zeropium.com/8707102433zkhoj.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/mr_heater_big_buddy_fan_hack.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/bosquejos_de_sermones_tematicos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafinuxunowu.rf.gd/autodesk_fusion_360_update.pdfIn PDF document text
    • http://losotejusegiso.rf.gd/app_ios_scanner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b1f9d6-62f5-475d-ab81-d12dfa766d5b/wenesaxebovefunorut.pdfIn PDF document text
    • http://zukanimi.epizy.com/apostrophes_for_possession_worksheet_ks2.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/41574841029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42b9134-8dc6-47d5-b7ad-46a3eff6b1f2/how_would_you_explain_the_nature_of_climate_change_to_a_layman_or_ordinary_person.pdfIn PDF document text
    • http://vebilotavofako.rf.gd/ceragon_ip_10_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc24828b-6cb1-47cb-bcd2-671918c853e2/bimibasitezexagutap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5316a19a-b3e6-428e-bfe4-bf1f7208e39e/harley_service_shops_near_me.pdfIn PDF document text
    • http://peledopa.myartsonline.com/l_carnosine.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_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 5748 bytes
SHA-256: 968805829711fed9912233f07ff16f871cd57096662fe11d2e9669925f331396
font_01_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 11032 bytes
SHA-256: 9e2257e74c78842624ed47396b03f844ffd79ce53e2ab5c7d0971decd2b7e39e

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