Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b6e856e39d203f…

MALICIOUS

PDF

80.8 KB Created: 2021-05-25 00:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0059f4dce11d20cc161669abe05d16cd SHA-1: 78d16726582d8fb2151b75fa69c71c32761cefbd SHA-256: 56b6e856e39d203f9d302f8d43e82951d04866dec737c15ac1653c039ec2f10c
156 Risk Score

Malware Insights

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

The PDF file, disguised with a lure related to 'Gta 5 rare cars locations offline xbox 360', contains a significant number of external links, indicating a link farm or phishing attempt. The presence of a critical heuristic firing for PDF_SEO_LINK_FARM and ClamAV detection as Pdf.Phishing.Trojan suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://kuzutuzo.ru/strik?utm_term=gta+5+rare+cars+locations+offline+xbox+360 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389604/normal_602c2ab645c46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454684/normal_6023e48a8bd8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_604425f20a93c.pdfIn PDF document text
    • https://tedajurilazunu.weebly.com/uploads/1/3/0/7/130739962/kavem-nafew-mojowosun.pdfIn PDF document text
    • https://fakilopatezi.weebly.com/uploads/1/3/1/6/131606638/fowifaxe_datugajoxezizo_sadodoparom_penimew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5fc61e99801f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5ffb97877cb63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16b265d-a3b1-4e0d-9f84-7ebbdf35893b/glass_bead_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1a2c03-88dc-455a-b6d2-f260fb557e1f/fundamentals_of_chemical_engineering_thermodynamics_1st_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef0aa2a-0663-4dc9-8f6d-e11ee9e6e34f/26621250147.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/guidelines_aortic_aneurysm_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5d1008-15ad-4646-9e15-010c8db3b338/35176586470.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/kitonifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b8b3d8-1e1e-4dfd-89fa-9f81c25e6703/osha_construction_safety_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/pakka_chocolate_girl_kannada_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/jiwadajisezukotapetegune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325f6766-4345-4b8b-8492-ca841436f79e/84786837627.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/47486055193.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/attack_on_titan_tribute_game_2020_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f46c32-0258-40ae-98db-9e07d3932f67/disability_support_pension_rates_2019_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc3dc6f-65ab-4462-91d1-067d59549fda/suvakoselanuwenexaxavu.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/85435932681.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/google_chrome_browser_2019.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_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 5700 bytes
SHA-256: e9b45610147faa98e3c8998216afcfe4510b3a668b29c5ec5a1c9c17f2a21530
font_01_sfnt_off00011188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11188 10472 bytes
SHA-256: bcbd7434798c21932810693f7af46235b7f21f15d9950bd1673e7ffe0f703cac

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