Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0945953b4ac540…

MALICIOUS

PDF

88.2 KB Created: 2021-03-29 17:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b84d3d7a69442d252d4952fa22d6b12e SHA-1: 2702d2b3a32e52ecefeb8cf472188c7d7b47d724 SHA-256: 4d0945953b4ac54069640ec0d31f8079154e8d6a8bebe222b50809ab2c04e26c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 or trojan variant. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely used for malicious redirection or hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting an attempt to obscure the true malicious infrastructure.

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 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=foundation+trilogy+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447085/normal_602e73e0c12bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_60613c378950b.pdfIn PDF document text
    • http://legiontry.online/138980791011z4ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fd145aeb4167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463526/normal_5fe11e8362175.pdfIn PDF document text
    • http://razvivatel.blog/determine_the_moment_of_inertia_of_the_area_about_the_y_axis._4yx2utzyw.pdfIn PDF document text
    • http://badgesverified.com/antd_datepicker_formatb3bqc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugupur.epizy.com/29885358712.pdfIn PDF document text
    • http://riremeg.rf.gd/gefewenililajijajebogorob.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/how_to_set_up_winegard_satellite_dish.pdfIn PDF document text
    • http://tupikodufalapa.epizy.com/allen_online_test_series.pdfIn PDF document text
    • http://fereralud.epizy.com/aoe_2_rise_of_rajas_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/13163619989.pdfIn PDF document text
    • http://panadokopejed.epizy.com/jubig.pdfIn PDF document text
    • http://wokivisifekesi.epizy.com/45961608637.pdfIn PDF document text
    • http://vudunebavibag.epizy.com/what_does_dormir_mucho_mean_in_english.pdfIn PDF document text
    • http://webezivoxubabo.epizy.com/pill_camera_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/commodore_64_keyboard_for_pc.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_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 5024 bytes
SHA-256: eab0153e1608404374c1b178f42c8993a5afe8908b58e84b537599f6cf6d103d
font_01_sfnt_off00012ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED4 10812 bytes
SHA-256: e9ac669bc4d38662660ca4d11185e838d5c19f964f7a4658f22ab5ec2dfb9603

Open this report in the interactive analyzer, or submit your own file for analysis.