Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a3841f40e9f6cc…

MALICIOUS

PDF

82.8 KB Created: 2021-04-07 16:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9403493664ab2ad062deab91b2dbf7aa SHA-1: 251c9e4d91720659f9d07b9e1081fdcae9753e3f SHA-256: 46a3841f40e9f6cc61340269a881126310b1c39160e87679f31c5172e944ea0d
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious, exhibiting characteristics of a phishing lure. It presents itself as a manual but contains numerous links to disposable domains, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mezovuduw.ru/strik?utm_term=bissell+proheat+2x+12+amps+max+power+manual PDF link annotation
    • https://cdn.sqhk.co/lojeliju/UNzwwmN/bike_racing_3d_mod_apk_rexdl.pdfIn PDF document text
    • http://chambreop.xyz/2536161025630p7q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470964/normal_5fd899acb0eb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406777/normal_6006e4d0ddfdc.pdfIn PDF document text
    • http://littlenat.space/42550349029l7k3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426571/normal_5ff1698e36ff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468540/normal_6020d5af7167b.pdfIn PDF document text
    • http://ca-manalapan.space/zolemokudipidujupiwufi20s6b.pdfIn PDF document text
    • https://cdn.sqhk.co/lunabati/gliegjg/how_big_is_1000_words_double_spaced.pdfIn PDF document text
    • https://cdn.sqhk.co/kutupejotige/iJijggq/redarawenokugoris.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_600ff17d522c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/08744dd0-3830-40f4-a11d-5a95747790b6/90338118300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687123c2-2f9c-4042-8569-e968241cdcdf/62563966850.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/ruxipuporeludidipubudaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc05cc0-a1aa-41ec-b45a-c3b0b9e4fb21/naruto_shippuden_box_set_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50308a95-addd-4918-8d24-b91af8758750/vugisoxukekidupefiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac21870-cde3-4a7c-817f-21f370749816/night_shift_lyrics_commodores_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c0b33a-0932-4659-9aef-cc0f22adeb35/donuvuturefol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e414eb-64e8-43bc-a634-5e9e53e5a8d9/zukubiwiw.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/clip_india_whatsapp_status_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6400de-840a-4f16-9789-50faee76eecb/how_to_replace_dometic_awning_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ff6da3-68d3-42f3-bd7e-f8e51663c360/9670484650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032b95a0-d5dd-49e1-b6ee-9539ab906691/python_for_loop_increment_index_inside_loop.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 3080 bytes
SHA-256: 0fcef192c95d6fd4d5333de3e5f0a04c8525a73f6e29f4febd37223f58d6e746
font_01_sfnt_off0000f42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42B 5336 bytes
SHA-256: 9668d3697846b5a319a1d02917eb8a20bf6fa28b0fea29941815ffe2b3bb4c97
font_02_sfnt_off0001063d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 11892 bytes
SHA-256: 728e21bd34f407c01089ddc4f0973d8c264f22e4e65ca711a48d503037579a89
font_03_sfnt_off00012eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176