Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a184b1d09bae26b…

MALICIOUS

PDF

79.5 KB Created: 2021-05-05 21:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 04bf3177d0581d56c64b9837239ee757 SHA-1: 24c77dcc59ad8347f19fb33dc24e8ecc7b66e426 SHA-256: 5a184b1d09bae26b1449bff333bcedb5ea0c4d722621534f8ac857e6e93f58e9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://seumenha.ru/strik?utm_term=how+to+connect+rca+soundbar+to+smart+tv PDF link annotation
    • http://vivubowi.getenjoyment.net/les_fleurs_du_mal_rsum_court.pdfIn PDF document text
    • https://zivumipit.weebly.com/uploads/1/3/4/3/134317334/7745980.pdfIn PDF document text
    • http://help-business-media.com/547882564019ct3g.pdfIn PDF document text
    • http://yourcy.com/the_bride_julie_garwood_review83psc.pdfIn PDF document text
    • https://fidunisowasewi.weebly.com/uploads/1/3/4/5/134599354/ruvatafajewa.pdfIn PDF document text
    • https://cdn.sqhk.co/juxezijafoz/WX8TXje/womens_voodoo_magic_witch_doctor_costume.pdfIn PDF document text
    • http://passive-income.ru/nibonovogotaxeduf2yadg.pdfIn PDF document text
    • https://bevikutemo.weebly.com/uploads/1/3/4/6/134648684/gatoruxolexap_juzebesijezu_movijevukib.pdfIn PDF document text
    • http://instacopyrightcenter.com/what_does_the_bible_really_say_about_divorceovm99.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/icNggdX/rujofevipevumemuxarogi.pdfIn PDF document text
    • http://xukosususif.medianewsonline.com/automate_programmable_industriel_s7200_de_siemens_cours.pdfIn PDF document text
    • https://cdn.sqhk.co/siwebove/kIjahdm/974679639.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/rivitovadiw.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzudumijamo/O9tziaw/download_one_shade_custom_notifications_and_quick_settings.pdfIn PDF document text
    • http://eurozone.pro/how_to_turn_on_moto_ghaesg.pdfIn PDF document text
    • https://mapivabivex.weebly.com/uploads/1/3/0/7/130776319/a52556bf7d4b.pdfIn PDF document text
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/cc4b019fa5.pdfIn PDF document text
    • https://cdn.sqhk.co/palevisi/QhgwDjj/app_blocker_premium_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/best_druid_circle_of_the_moon_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af0c6a0-8ab9-4929-99fe-1ac598a7fdfb/78196002046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fb960f-5828-499a-a733-05053fdaf28f/metal_gear_solid_2_substance_gog_controller_configuration.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/79895558887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d48320a-147b-4ace-9070-b3d02e4d4085/john_deere_mulching_mower_blades_42.pdfIn PDF document text
    • http://gexegubiduw.atwebpages.com/90096659078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdb3019-a5ad-4ac9-b537-e660374069c2/970a-g43_plus_overclocking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf85715-69e5-49cd-a296-d9cd3f8b3e97/navy_evaluation_and_fitrep_writing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/root_android_phone_apk_free.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/voronas.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_off0000f99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99F 5304 bytes
SHA-256: 7b27ee7aed989362ba3ac36e562522f9dad896a8d3a0dd7e6cd869fec567af78
font_01_sfnt_off00010ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA5 10652 bytes
SHA-256: dfd648d68eb2b9f228a85b5504e2ac52d1f6c1b5627c4a04a2a0e7d1cb1264b0