Malicious PDF — malware analysis report

Static analysis result for SHA-256 84698e681bed4da3…

MALICIOUS

PDF

74.3 KB Created: 2021-02-20 00:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 68a85d6c3b3f4e4c70b12dd6d2406540 SHA-1: ce4a69a00df20348c4433e4f1c44db5cee24ef4e SHA-256: 84698e681bed4da31f0360f0400e1cded704db93558d648c98bcc1f2f9bebf93
154 Risk Score

Malware Insights

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

The file is a PDF that contains a link to a known malicious redirector, yafferge.ru. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to trick users into visiting a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=wf-2630+change+ink In PDF document text
    • https://cdn.sqhk.co/towevefizub/hbdggji/gain_followers_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/jhgZchc/bemasejop.pdfIn PDF document text
    • http://upgrade4me.com/invitation_templates_to_visit_usabhngm.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/cGxjijb/xemasimuxefadotorolabu.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/hjkgjig/xibelozumu.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/hadhKij/chromedriver_drag_and_drop_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/ehjgiif/82848181254.pdfIn PDF document text
    • http://kernig.store/bituladugibiw1esme.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/i5jfijb/pawadosufuxasobo.pdfIn PDF document text
    • https://cdn.sqhk.co/wulozonixuf/jcievsc/wavobu.pdfIn PDF document text
    • http://greatholl.com/ophelia_piano_sheet_music_freeray82.pdfIn PDF document text
    • http://italia-doc.fun/gukasebepakewujotopo8gnmf.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/NVGEjd5/pojowadolunaloviduxeximi.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/donukadizolin/pafalelofokefelaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/7890340372.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/bar_diagram_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/dixusudoz.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/teamviewer_14_reset_id.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/calotropis_procera_review.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/assume_form_chords.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_off0000e764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 5536 bytes
SHA-256: 37b8132e321f96ca197f575593a6e5ae6f40c9b0b10acdae2bc3ffb2aa7864c8
font_01_sfnt_off0000fa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 9860 bytes
SHA-256: 78972f22dde8581225dd6fd65b7b6224ebb56b1428c542b8168e7f06fe87ba66

Open this report in the interactive analyzer, or submit your own file for analysis.