Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddb60bc2d27f1f6…

MALICIOUS

PDF

84.0 KB Created: 2021-03-28 20:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0558de739b2166413c59e10b8d6f2899 SHA-1: bb90bd2068671e54cbeaf50964cfcc74ef16213c SHA-256: 9ddb60bc2d27f1f688f09644a5f48f9c20757da819e350d6152a02ec58df75f8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, likely for initial access via spearphishing.

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
  • 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://golowaki.ru/strik?utm_term=ben+raymond+karli+harvey PDF link annotation
    • https://panelaxefejavej.weebly.com/uploads/1/3/5/3/135306159/4220291.pdfIn PDF document text
    • http://zasufigonibat.getenjoyment.net/hdfc_ergo_travel_insurance_premium_chart.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/XvFbge3/four_in_a_row_free_game.pdfIn PDF document text
    • http://liketime.fun/best_mp3_player_for_under_50633l8.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/hbmhhT5/zijeje.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/eelidWW/bet_her_free_trial.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/e0ec2ac26a4.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/voxemew_lazofimidumo_namokilapiwiv.pdfIn PDF document text
    • https://zivodigogugev.weebly.com/uploads/1/3/4/6/134664532/moxopuzovetejapiju.pdfIn PDF document text
    • http://gramnews.xyz/pojagopawaselcjgzn.pdfIn PDF document text
    • https://ratesikumetu.weebly.com/uploads/1/3/1/1/131163578/8822278.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/Yd6gihf/free_music_download_for_android_mp3.pdfIn PDF document text
    • http://siondez.ru/86446248043336yn.pdfIn PDF document text
    • http://frasqen.online/suturagifejuxozagefowuzagenzto.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/eOhaifo/xosuxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/feba2507-53c4-487f-95a1-d9757c353677/77871907818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fe30a6-a424-407c-a8d1-6867e8ed5999/how_to_solve_j_perm.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/synaptics_pointing_device_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/banjul_airport_arrivals_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe67bed-1801-44fc-ac10-1a3076d0177a/bissell_power_steamer_power_brush_directions.pdfIn PDF document text
    • http://sopavame.onlinewebshop.net/vakazesutakemavutejodomo.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/wufuxolalop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF28 3044 bytes
SHA-256: 077c9d1f363836090044d8ec301bdccd8b8f2633f8e7cad60cdae01df5771239
font_01_sfnt_off000109fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FC 5160 bytes
SHA-256: b39d4b55fa561fa7ade6494130d540214286c3f713ed345c27d2ef8b02fd60dd
font_02_sfnt_off00011b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6C 11524 bytes
SHA-256: c8131d7eb6197d812522ce285eec2e2be9330a0aa3e6e679fe6d8f5274d76afa