Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ab0f9086a643c8…

MALICIOUS

PDF

97.4 KB Created: 2021-04-02 03:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dc0dfd2d75a18aef9a5ba961a5d113bf SHA-1: 10a42a2085e29c0540293a21b598e51fd5a0d375 SHA-256: 82ab0f9086a643c8ced3891f7481cfa575f2e5c805c6b0d8c46dc2d366019454
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated, but the presence of the redirector URL and the heuristic firings point to a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=wanna+break+night+meaning In PDF document text
    • https://kuwiliwal.weebly.com/uploads/1/3/1/3/131378779/bowadibusur.pdfIn PDF document text
    • https://fadejumiz.weebly.com/uploads/1/3/5/3/135349507/9601692.pdfIn PDF document text
    • http://dommasters.site/ezgo_robin_engine_parts0d034.pdfIn PDF document text
    • http://bridgecommerce.com/205278004471a91c.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/lemizaror.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/difference_between_sociology_and_anthropology.pdfIn PDF document text
    • http://rollernefrit.xyz/why_wont_my_hot_tub_inflatepeprq.pdfIn PDF document text
    • https://ginegumogigoxi.weebly.com/uploads/1/3/2/8/132816185/pirunujesanaxan.pdfIn PDF document text
    • http://mifvideo.space/51612466945260sj.pdfIn PDF document text
    • https://nipixajivoru.weebly.com/uploads/1/3/1/4/131436983/6c54165d76.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/47498126842.pdfIn PDF document text
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/1743578.pdfIn PDF document text
    • http://es50off.pro/beyond_the_wall_rpg_playbookskfyfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/90fb9975-2184-4963-a188-570567f0599d/garmin_nuvicam_lmt-d_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/tik_tok_assamese_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/how_to_make_easy_mob_grinder.pdfIn PDF document text
    • http://fonobufusig.rf.gd/53175583123.pdfIn PDF document text
    • http://renunuxuxalebav.epizy.com/sonovixubaxosene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a151b83-96b2-4f53-bd95-b9a9383ff6d8/23511221801.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/bootstrap-_theme._css_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e5032b-33ff-4f5c-8f44-1b0a3e46e9ce/how_to_put_belt_on_bissell_powerforce_helix.pdfIn PDF document text
    • http://batefagut.epizy.com/xorokutividegowovukaponaw.pdfIn PDF document text
    • http://benesaputezoxo.rf.gd/xabimesulege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a844620a-4058-41c4-a22f-18185b84b3ca/el_formato_apa_lleva_numero_de_pagina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c402c5e6-5794-4604-a11e-330f6fcf3bd0/how_much_can_you_increase_rent_in_ny.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11502 5104 bytes
SHA-256: 7dc5e14e6b4c56580d5eb2b960c4daf14e76b78e2e65d09430d772147d068367
font_01_sfnt_off00012642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12642 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off000131a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A4 11112 bytes
SHA-256: 4327fdc41b3b2e106daea7178fb46a8312707f7659e3211ed57c2f1774b69c4c
font_03_sfnt_off000157b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157B0 9624 bytes
SHA-256: 555a391b9231a8c8c7a27ef709096910686191b07282e6254579fd11b9a61169