Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d136ba61894b19e…

MALICIOUS

PDF

90.5 KB Created: 2021-04-10 03:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: da4916b76eee811763b812add6c35020 SHA-1: 737d0c9917cb5ecfd794dce50cdcad3d8e2491c7 SHA-256: 7d136ba61894b19e1bac900507c860390540c0a505ec3074fcf7ecceee913521
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded URLs, such as 'https://gimoguvi.ru/strik?utm_term=can%2527t+adjust+backlight+on+samsung+tv', likely serve as entry points for further malicious activity or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://gimoguvi.ru/strik?utm_term=can%2527t+adjust+backlight+on+samsung+tv PDF link annotation
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/makipafogenano-ronerudiruvab.pdfIn PDF document text
    • https://soneputud.weebly.com/uploads/1/3/1/4/131411150/a60e6d71e33f.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/peduwizoxitew_toxojiku.pdfIn PDF document text
    • https://jiwebatije.weebly.com/uploads/1/3/3/9/133997557/2d67d388d8.pdfIn PDF document text
    • http://podarokinsta365.site/pumogotegasopapapixawepuse5msh.pdfIn PDF document text
    • http://fullpisetc.ru/skyrim_tips_and_tricks_switchlfrsu.pdfIn PDF document text
    • http://henrysavbr.site/71555458070w3hia.pdfIn PDF document text
    • http://kismykeitio.best/can_you_sue_someone_for_emotional_distress_in_californiavk32k.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
    • https://uploads.strikinglycdn.com/files/5956cfa0-5875-4fa3-af73-dce1c3f93bc6/74042083604.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/creative_cv_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a964fc4a-c298-46c8-be99-7059c518e392/what_does_technical_drawing_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/adenitis_mesenterica_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d5e2ab-e857-4ba6-b89f-70168cbe9a47/descargar_musica_gratis_para_celular_mp3_xd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e364e8e-32f2-459d-a51f-ac9d2f455841/bionaire_digital_cool_mist_humidifier_with_permanent_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/fapawal.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/61682182116.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/vunukes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e676f25d-5555-46dd-9337-bfc21975693c/21125408971.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/93610933762.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/83919299756.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/how_long_do_you_cook_a_medium_sized_sweet_potato_in_the_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749cccc2-6d28-4395-b412-cce744650e86/14522994855.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_off000112f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F0 5416 bytes
SHA-256: 836dc044929eac4f05a2ed7f9564fb4a398e321899b78eac7fb7842dee868543
font_01_sfnt_off0001253e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253E 12032 bytes
SHA-256: 4d870da4da28ed85eba37bacd0e0578cdefa393e554aaedfee6490ce6b1a481b
font_02_sfnt_off00014de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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