Malicious PDF — malware analysis report

Static analysis result for SHA-256 895fae4f1f2ce1f0…

MALICIOUS

PDF

92.0 KB Created: 2021-04-24 03:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 09bbd193fa3c163a4185cb9fff920d5d SHA-1: cbe92ed41788c96c42917cc001fccce381b3236f SHA-256: 895fae4f1f2ce1f0bbd0b8ca8bbf3dee0cae1163d49cde1785f3ecbb6a0c3444
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 hosting or link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic indicate a strong likelihood of phishing or malware distribution.

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 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://soxebez.ru/strik?utm_term=fender+hot+rod+deluxe+george+benson+specs PDF link annotation
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/9c8c3aeb0cb.pdfIn PDF document text
    • https://bumijukepemuno.weebly.com/uploads/1/3/4/7/134728240/mevigugo_bituvok_ruduwigovur_kejuzegudixul.pdfIn PDF document text
    • http://lovasosirukes.iblogger.org/brussels_centre_map.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/gct6fDv/flight_simulator_games_for_pc.pdfIn PDF document text
    • http://merokomazojewi.scienceontheweb.net/waxoteveduges.pdfIn PDF document text
    • https://cdn.sqhk.co/salijuvam/bfPgiji/arcade_horse_racing_apk_free_download.pdfIn PDF document text
    • http://gupupokuvugal.22web.org/xuvixazepezexulunukobar.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/0fAPZ66/wisavisusefoxo.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/nbc_bye_laws.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/8518695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewivawegimomu.epizy.com/zedezuxajevejexojanodo.pdfIn PDF document text
    • http://bigofufujenu.epizy.com/apache_ant_1._9._6_free.pdfIn PDF document text
    • http://zozezad.epizy.com/82539984343.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/pekujadewo.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/80741056433.pdfIn PDF document text
    • http://vemixizafij.rf.gd/silver_diamine_fluoride_patient_information_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/25303309236.pdfIn PDF document text
    • http://vewomani.rf.gd/msi_970a-g43_bios_update.pdfIn PDF document text
    • http://neriwolesatopux.epizy.com/adobe_illustrator_shortcuts_mac.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_off000128f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F7 5288 bytes
SHA-256: cdfdf53397bf3678f264387fbe2ae7cd8ca1cdff7c6c20199afd3cae308176bc
font_01_sfnt_off00013af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF4 11880 bytes
SHA-256: 34a9033abc0623a89d02c6203513b00ca131f80f1b645f6d4fcbd5ba3c8afbb4

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