Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef329f84c34396d1…

MALICIOUS

PDF

74.4 KB Created: 2020-11-20 02:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eb9b8faa1a3ad2a1ca5fb102c016b81a SHA-1: 4eb32f77970433a702f7a7620f0d8adbe98d68f5 SHA-256: ef329f84c34396d128b3153393c23bb75bed24cd93f0cacf13400dce8eb4b32d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of an external URI and the overall detection suggest a phishing attempt disguised as a remote control manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/strik?utm_term=daikin+remote+control+manual+arc433a21 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e54ec2c-926b-43cd-8ea5-1d740f9fcc3f/vafepino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce19206-e98a-4ef3-a031-d7d17e3cde6e/bonesasupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed53a205-663b-49b0-873c-fc55c174fcd5/58703753107.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/jogofawulafamisilezul.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/dunhill_homes_frisco_hills.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/simplified_method_worksheet_2018_home_office.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/sap_service_entry_sheet_goods_receipt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10303ccb-3723-48dd-810a-b4a6962eb2e5/6881108730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545718c3-9a40-4b89-a137-f4fca46b7969/policy_making_cycle_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/1299179336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be47a0dc-ab4d-4606-bd30-40b7c5a0fd91/partition_flute_traversiere_chanson_connue.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/tripp_research_magazines_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381a6377-e2ee-47cd-8893-53433c1d17f8/34298576560.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/bise_fsd_9th_result_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f88d1e-4945-4896-a3cb-b19ef48741fc/93958581238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0123bfcd-83a8-4c30-ba8d-9c0d4eb919ed/the_last_dragon_gacha_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd04bef4-4545-4531-a24b-ef1d37f38285/j_ai_voulu_planter_un_oranger_parole.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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 5268 bytes
SHA-256: 66fac1d37f3c2b89818e2514a8c327f77c441e5688be9b85750ba14af1d3ce0c
font_01_sfnt_off0000f7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F1 10768 bytes
SHA-256: cf6bc9a7ed714119039a84346820d34ae44dcb453bcc7bad92b85a405cb70d55