Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd935f86bc4ac24…

MALICIOUS

PDF

71.3 KB Created: 2021-03-10 07:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3025cfdb9f8c7d2945cbba6bf368e013 SHA-1: 31562ada5e6620896d15480b63c5a3afd6447ae7 SHA-256: bfd935f86bc4ac246c05b17b90b2a5c645a05286d433cd1a3edc40fb7e058e72
126 Risk Score

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 0.9993

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://nipisod.ru/strik?utm_term=prince+lionheart+wipes+warmer+replacement+pad PDF link annotation
    • https://cdn.sqhk.co/lebexuzo/jwBZJVQ/mx_music_player_free_web_series.pdfIn PDF document text
    • https://cdn.sqhk.co/xemajuvinel/eHKjghj/juventus_fc_logo_change.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/Pmgfji1/82051299378.pdfIn PDF document text
    • http://awpmode.com/at_what_age_do_fears_about_death_tend_to_be_the_greatest0g9z8.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/Xi4jfog/maxopezobib.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/jjGiwhj/how_to_get_xfinity_stream_on_firestick_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/f0jhjLz/block_puzzle_jewel_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rowemarul/jAYqzAn/teri_call_video_song_djpunjab.pdfIn PDF document text
    • http://netewe9.xyz/gafotukimus1fu4y.pdfIn PDF document text
    • http://hermidkovo.info/24605718491fb0rc.pdfIn PDF document text
    • http://sberbank.link/excel_betinget_formatering_flere_cellerjepcm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_35154964b961432b824315e9d1e12781.pdf?index=trueIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_19f07a3352cb49f8bc86c063354b8429.pdf?index=trueIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_51548b398d3e4ac7b5f5f317c2a4032d.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_0c2d2b92835a4965b181ba775986015a.pdf?index=trueIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_e725f5c3383941b2aa22484adb48c4b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefabe/1821298624.pdfIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_b5edd02b09e342f5b36d255795428619.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/33927058731.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/photo_background_frame_software.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/lapilabebawesirowelebu.pdfIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_1887edfff6f6415d98b2509889edb9c7.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_77965306f3184902ad46f95a64b7c1e5.pdf?index=trueIn 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_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 5408 bytes
SHA-256: 616f2d4d8ed8881029d94166d1d487a8d070dcdcaedb4145aa93b98764d25b82
font_01_sfnt_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 10928 bytes
SHA-256: 46860e7659be8c9d7853bb14e4d926405164704f8f337701db021ad990e9850e

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