Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8059744cb799e2…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 06:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9ba10fe3d8d37fad9edd8d1cf3b0c230 SHA-1: 990dda045dff718375603d2f03bfcf20ec5bf823 SHA-256: de8059744cb799e257fe1a2d658ec37a55f7c5861e5b0724285edc848a354bc8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://vilenefex.ru/strik?utm_term=what+is+the+enthalpy+of+formation+for+solid+rubidium PDF link annotation
    • http://price-list.moscow/77188500677a6oqa.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/jjgGWUW/gamemaker_studio_image_scale_not_working.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/annual_report_of_tcs_2020_18.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/bupiwanem.pdfIn PDF document text
    • http://busibear.com/suncast_hose_reelmlciv.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/past_simple_present_perfect_exercises_elementary.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/hXicige/off_road_jeep_car_racing_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/zcqNhcC/23877927395.pdfIn PDF document text
    • http://namelesssouth.xyz/sejavobeterozixni8nn.pdfIn PDF document text
    • http://shoop-fn.ru/gijevagekal6b0.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/kinetico_water_systems_costcog5qus.pdfIn PDF document text
    • http://instapriz365.site/xekawopekovigukavisomy7ey.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/dijebadovatutid6p3i.pdfIn PDF document text
    • http://guitar.su/navy_blue_jackets_manual_25th_editionvfsny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_aa7b93bfc788453f80e8934d8e89e04f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb93380-5ea2-424a-8cb5-bbe724c5ea6b/braun_thermoscan_exactemp_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5578dd0c-5801-40ef-a8a0-626d45f0d17d/what_is_scl-90-r.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_96c98579e67149539d8f30784279a469.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/705b44d0-ff7e-4070-9702-69f69833adfa/how_to_program_suddenlink_remote_to_roku_tv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62E 5536 bytes
SHA-256: 509c7c1842214e88aac0d2becbdf0e3b54fb8ae94c91fc4c4abfd93bde6f451b
font_01_sfnt_off0000e8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E4 11124 bytes
SHA-256: 66a7ecbbc3af9044e295d41282774d036096f658343151efd7f7c424f63d15df
font_02_sfnt_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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