Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ae2783859151ef…

MALICIOUS

PDF

90.7 KB Created: 2021-04-09 00:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 19e9fcac3fd98d6b7abe598589bd7e9b SHA-1: 5b31067ec01299ae63370a0d7d79657052ee94c1 SHA-256: c8ae2783859151efe41a111c63597538d9c8ed65761f6b9717fc223956c0c3c7
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for popular movie content, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://yafferge.ru/strik?utm_term=twilight+saga+eclipse+full+movie+in+hindi+watch+online+openload In PDF document text
    • http://doordash.link/88429561516o6saz.pdfIn PDF document text
    • http://homebig.space/offroad_car_gb46lo.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/jaiblrm/patesize.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/commercial_vehicle_inspection_report_formyojad.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/igjvggc/8159428757.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/fZXhaif/wubixitotow.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/ihovbjc/bandook_chalegi_video_song_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/bZzii0D/panda_games_run_2.pdfIn PDF document text
    • http://im-marceting.site/xovenugcwu3.pdfIn PDF document text
    • http://shop-onlain.fun/varowutobn4ilg.pdfIn PDF document text
    • http://mumidiw.22web.org/spanning_tree_protocol_select_root_bridge.pdfIn PDF document text
    • http://fishland.store/in_search_of_sisterhood_ebook5sf3q.pdfIn PDF document text
    • http://sluzhba1.net/hp_photosmart_d110a_wireless_printer_driverz15g5.pdfIn PDF document text
    • http://libifutolile.iblogger.org/the_atheist_s_mass_balzac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giritinip.epizy.com/how_do_you_know_when_your_kangertech_evod_is_charged.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_45aa882f36b942429009e7c6e80a5fd8.pdf?index=trueIn PDF document text
    • http://povalimokuwov.rf.gd/dyson_dc35_filter_switch.pdfIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_d6fcb49268e64748a728a6658e5df1b5.pdf?index=trueIn PDF document text
    • http://bewegemoketofa.rf.gd/gokazevixitawixivunuvi.pdfIn PDF document text
    • http://ponaxowem.epizy.com/tidaxal.pdfIn PDF document text
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_5a675b5732894c89b62d7462e3e83f3e.pdf?index=trueIn PDF document text
    • http://bonizijar.rf.gd/74235326012.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_bb7766509b9f4b82812ec9ee35d95095.pdf?index=trueIn PDF document text
    • https://9f61dd91-ea7e-4edc-a837-c43fae5dccfb.filesusr.com/ugd/ed897c_8318f16a0eb54b038f3720b36d43153c.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_off0001261d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261D 5576 bytes
SHA-256: 33a2e424bec27cc71e52b7690de579ba351f0caf9779de02ad0db089e8681e73
font_01_sfnt_off0001390b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390B 10496 bytes
SHA-256: 5d50fbd2b9842e58988ff83e0795895f575a79e39520b38e723ae6cd48f119a5