Malicious PDF — malware analysis report

Static analysis result for SHA-256 a355de036f4f54cc…

MALICIOUS

PDF

105.3 KB Created: 2021-04-14 23:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6c5114e2a9bb76716892a1d003c16278 SHA-1: e7a7321818fe64d5a4fb267fcb33ee25bbd214d7 SHA-256: a355de036f4f54cca9962f169f4c13fede4359352db486199f84fcbfcfc15a79
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=the+vampire+diaries+cast+season+8 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408002/normal_60015a758289b.pdfIn PDF document text
    • http://cashbackk.site/34751107449q1y1l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445119/normal_600643b16bf39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_6007452780962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490516/normal_6069f1df6779f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_5fc87e445d65e.pdfIn PDF document text
    • http://momsmall.space/free_music_maker_softwaresvryca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484363/normal_6028314bc3b8f.pdfIn PDF document text
    • http://mananeje.66ghz.com/how_much_does_laundry_service_cost_in_nyc.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://s3.amazonaws.com/jipowumat/polycom_soundstation_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/squarespace_templates_for_photography.pdfIn PDF document text
    • http://xejuzilawa.rf.gd/94753761653.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/ankusham_audio_songs_com.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/74691139566.pdfIn PDF document text
    • http://vititonu.epizy.com/how_many_houses_in_monopoly_before_hotel.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/lavazza_espresso_point_matinee.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/96446024800.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/giligeruzogodudegoseja.pdfIn PDF document text
    • http://wuzuvulas.epizy.com/zulabu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/3807231411.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_off00014ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ECE 5272 bytes
SHA-256: 13150e795e761b89b3ec6274c25fa8e4d0c71f0e26233e07999bcfae1c558513
font_01_sfnt_off00016090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16090 12120 bytes
SHA-256: a49cbc7ceb4e44901b0cb7a5de78c2d82840bcfe85dabf89dfc23bd253f5d966
font_02_sfnt_off000189aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189AA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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