Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca9e11644eeecfc…

MALICIOUS

PDF

80.4 KB Created: 2021-03-24 14:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2588aafa53c70ed496c18897a8907c76 SHA-1: e56c7b68061628e11d035e965fad405bfe6ff993 SHA-256: 4ca9e11644eeecfc40fc81d6e8a309b05c81b77849fd7ce483a622fdcb4a7157
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 hosting, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to reference firearm reviews, likely as a lure to direct users to the malicious URL. The presence of multiple external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=sig+sauer+p250+22lr+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471091/normal_5fec841fc7624.pdfIn PDF document text
    • https://cdn.sqhk.co/dagedazi/iggjahc/minejevugafarevogapowux.pdfIn PDF document text
    • https://cdn.sqhk.co/lewonuvaxu/cReOD0a/jadapumop.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/Qiahfjg/my_talking_tom_2_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/Ajg8giz/descargar_wizoo_latigo_gratis_downloads.pdfIn PDF document text
    • http://budivabod.iblogger.org/can_t_maplestory_launcher.pdfIn PDF document text
    • http://dilurijarejo.22web.org/how_much_are_dexter_washing_machines.pdfIn PDF document text
    • https://cdn.sqhk.co/mudixeguda/MjeZnUd/wavetek_9100_calibration_manual.pdfIn PDF document text
    • http://gafujovinotu.22web.org/guwahati_university_ba_1st_sem_marksheet_2018.pdfIn PDF document text
    • http://lujadexezusunam.22web.org/before_sunset_movie_kickass.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499958/normal_60468dbb24205.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/40332308461.pdfIn PDF document text
    • http://xajifefule.iblogger.org/king_platform_bed_woodworking_plans.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jPohciY/rovarejeg.pdfIn PDF document text
    • http://gesikus.22web.org/al_quran_terjemahan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_6059f47a901ea.pdfIn PDF document text
    • http://gisaxisiburu.66ghz.com/tokejevodotiwomeki.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/AgN7xjf/off-_road_rally_game.pdfIn PDF document text
    • https://cdn.sqhk.co/lirotigi/s6haVig/define_speed_velocity_and_acceleration.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://selusibe.epizy.com/dementia_guidelines.pdfIn PDF document text
    • http://jitimixilu.epizy.com/ofsted_report_childminder_inadequate.pdfIn PDF document text
    • http://losapudobo.epizy.com/census_of_marine_life.pdfIn PDF document text
    • http://fiwipofel.epizy.com/ielts_speaking_test_samples_with_answers.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.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 5640 bytes
SHA-256: 995c13322ffd094782e9dabaf4c4c64b9d9e21b2ae87886e4ff22c3b4e149d29
font_01_sfnt_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_02_sfnt_off00010d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D41 10760 bytes
SHA-256: 52f0b1a4fd73fc9c1871dfff3ecdc023b5c0c037b7e7cf78e2257372ba66c4f6

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