Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a25c5321190628…

MALICIOUS

PDF

95.2 KB Created: 2021-04-06 04:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: de47433b469b9842286591273444eaf2 SHA-1: d8d3f0dfd8fc6a3ceb722bacdc800bdbe15b414e SHA-256: 09a25c53211906285c15800d3fc29090607c33b18066dd081f2b9be040827653
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/wix?keyword=sonos+connect+manual PDF link annotation
    • https://cdn.sqhk.co/rokajoten/GxHbWhb/86353649784.pdfIn PDF document text
    • http://ovca.space/exact_equations_differential_equations0bden.pdfIn PDF document text
    • http://pinerapidsrr.com/behringer_u-phoria_um2_driver_free_download_macxuah6.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/sikajab.pdfIn PDF document text
    • http://carinsusa.info/8932778886uikj7.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/fshiAGO/best_anime_live_wallpaper_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/jhTjbnE/fantasy_forest_desktop_background.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/QeAj4ja/drive_in_theatre.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/ghdhihd/pagalabutajoxiwivu.pdfIn PDF document text
    • http://wukifiduputafeb.22web.org/49891106222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_6e5beb4f67764ac1b4090497674d7933.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff8a8da-2cc7-4215-8a8a-201ce0c27a78/65426374222.pdfIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_82e46e99a9af4782a72480767caf13f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee113eb-3350-4aaa-b03c-9bc19dd56160/bixuk.pdfIn PDF document text
    • http://nawezopekurid.epizy.com/jodelitotejikivakojur.pdfIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_80cf41f576b74521aba7a21c463927aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25974ec5-4e5a-4dfe-9f15-06f339295a5f/64054088066.pdfIn PDF document text
    • https://e2a12503-e9f4-4898-9b1e-00959bf5a9c8.filesusr.com/ugd/1f0de7_c5879fe359a44531ac9e99d1fb2066cb.pdf?index=trueIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_a79dbacde6b049faac7ca24d5ec59983.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6100611-58cf-45dc-a769-0fc830a5e917/weight_of_nordictrack_x22i.pdfIn PDF document text
    • http://fixidil.atwebpages.com/kekajidupeso.pdfIn PDF document text
    • http://tipofib.rf.gd/medical_report_sample_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c958b09f-2621-4150-a89a-7af33ba9870f/how_to_find_time_in_compound_interest_using_log.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_off000132c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C1 4952 bytes
SHA-256: 87aef6d0335724c809c9ded5bd4761f8268a52be4b10ffcd93c040de0646c667
font_01_sfnt_off00014386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14386 15316 bytes
SHA-256: 24e14fdbcb6499327378b9e565219f3857db9bb71a6c04a16f577c2d91e2e3cf