Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e834d3965e2579…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 09:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c342cbeee5c310eb83c1918a3fad9527 SHA-1: 4308f6bd994b7da75b38800bfe2affbe6b3e8384 SHA-256: 79e834d3965e257941f8e42167a4df18628607f9aadffb7c8059d423c82fa167
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of link farms on disposable hosting, reinforcing the phishing/malware lure pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=regla+2+del+voleibol PDF link annotation
    • https://cdn.sqhk.co/beluvano/ojdOuSQ/goalrilla_basketball_pole_pads.pdfIn PDF document text
    • https://cdn.sqhk.co/fagevibe/Hjjjmjg/21060027353.pdfIn PDF document text
    • https://gebedosoxabitox.weebly.com/uploads/1/3/5/3/135324181/1823563.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/fha8igt/russian_car_drift_crazy_games.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/zakukebis.pdfIn PDF document text
    • https://validujagobun.weebly.com/uploads/1/3/4/5/134526773/mobumizu.pdfIn PDF document text
    • http://goodsfor.life/netflix_price_target_2020l28mj.pdfIn PDF document text
    • http://gifinekinurubuk.iblogger.org/silatemozatowopasuwelavov.pdfIn PDF document text
    • http://somukegizos.66ghz.com/videlenakurix.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/ihmCgdv/v_mod_vape_magnets_replacement.pdfIn PDF document text
    • http://dazuwovu.22web.org/original_d_d_basic_set.pdfIn PDF document text
    • http://oneplusonemain.xyz/7th_grade_math_angles_worksheetsffd3o.pdfIn PDF document text
    • https://miremawa.weebly.com/uploads/1/3/4/6/134631892/10076b18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://likijanima.epizy.com/sample_performance_appraisal_comments_for_teachers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37127ec0-6163-4281-9458-2238ea0b8b40/magisidibifefupobo.pdfIn PDF document text
    • http://xuzinom.epizy.com/77795333646.pdfIn PDF document text
    • http://varijaponinaza.rf.gd/maginin.pdfIn PDF document text
    • http://kokegewabero.rf.gd/borrow_lend_exercises_with_answers.pdfIn PDF document text
    • http://beverunogi.rf.gd/totafenidodajuxexujoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c058c9-0be8-4ddf-bae8-a62f25de3787/little_house_on_the_prairie_season_1_episode_5_full_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776a925e-0e70-4977-b666-dbe789d54359/patupexamenadoginimut.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 5056 bytes
SHA-256: ab7a9a3bbb53b225225b76dfacb836b11da42fc8a48f947a225a68aa68719733
font_01_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 11128 bytes
SHA-256: 544b9e82b5f0128a184c6acc84d41188cc064160a1c9f4e0d039e69855bc8b75

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