Malicious PDF — malware analysis report

Static analysis result for SHA-256 3633ce39d2f7604f…

MALICIOUS

PDF

76.2 KB Created: 2021-03-31 03:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5af272c7f2c3e3c77102644e7edac1e1 SHA-1: 119db3c74874c0406b354ecf06ee20f429c0beb1 SHA-256: 3633ce39d2f7604fe4e8f56b2fd547d5fe85f4db43e7a3ccfa7dd066806ebcdb
186 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, rather than containing executable code directly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/123?utm_term=aopc+search+warrant+forms PDF link annotation
    • https://cdn.sqhk.co/zamepeja/Shdgfja/red_and_blue_air_jordan_1_low.pdfIn PDF document text
    • https://cdn.sqhk.co/tugirujozi/mygJggc/kigovolagugi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452217/normal_5fe56f1a4eb69.pdfIn PDF document text
    • http://bosaboro.22web.org/airman_s_creed.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/fYgdhjr/medusa_kampf_der_titanen_2010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_602c703e14e98.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/hjfjwBD/lajoxejidugenafofodeb.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/haZiiNh/vawufidubisekupa.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/TiguK4e/dumb_ways_to_die_plush_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/avN5mha/throne_room_star_wars_scene.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/hhVTlhe/excel_lookup_list_sheet.pdfIn PDF document text
    • http://gituwema.iblogger.org/risedatefutitegado.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/CicdZOp/learn_python_for_free_coursera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_600b22d186f55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369783/normal_5ff9f951751bf.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/Xppghb0/wanis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411498/normal_5fc605c23273c.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
    • http://gadabejevetel.epizy.com/jvvnl_junior_accountant_syllabus_2020.pdfIn PDF document text
    • http://mavadapeganitew.epizy.com/mosupuvewufulipakir.pdfIn PDF document text
    • http://tuvebiz.rf.gd/understanding_pathophysiology_free_download.pdfIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_529daffcc15e4ba2be0536637eb7f4dc.pdf?index=trueIn PDF document text
    • http://lamuverifob.epizy.com/aptitude_questions_and_answers_for_wipro.pdfIn PDF document text
    • http://pawubiba.epizy.com/english_speaking_learning_audio_free.pdfIn PDF document text
    • http://fuzezufomazo.rf.gd/excel_search_box_template.pdfIn PDF document text
    • http://vavijirodujozi.rf.gd/chick_corea_spain_sheet_music_piano.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_9c4eb85644984417ab33079c6a60e35a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7D 5044 bytes
SHA-256: 351e37cb78f9d8c9985c58e48441dad5f034d51d1d23e3d35efc209f796ae005
font_01_sfnt_off0000f075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 10576 bytes
SHA-256: 10ff553d456166d6c4739ee24c314cc26c98ccf03adf1558ad3ee9168358debf
font_02_sfnt_off0001147d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361