Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1f84b540ef9584…

MALICIOUS

PDF

72.8 KB Created: 2021-02-13 20:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 700651413e18d0a6549cde0304383391 SHA-1: 067fd0c5d150cd30fa43c65e8e1f73208c40b0e4 SHA-256: 7e1f84b540ef95848c029c3dba11dc1fe8b0c7c7e173cb3e4cbdbe4e26d30725
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://yafferge.ru/wb?keyword=skymovies%20%20south%20indian' is identified as the primary IOC. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely used as a phishing lure.

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
  • 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/wb?keyword=skymovies%20%20south%20indian In PDF document text
    • https://cdn.sqhk.co/pobijejok/VP9qhby/9601418341.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/wighejg/dofusotixufunowiwemi.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/gV1IYDr/vafedebuwevewuxux.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/gifiggh/77371700727.pdfIn PDF document text
    • http://kazoxizodasese.iblogger.org/honeywell_cm927_thermostat_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/Iaie9jf/68073974122.pdfIn PDF document text
    • http://haustova.com/about_time_2013_soundtrackay1ld.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/bjajgcl/supowimigoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/ritapabinap/5rBfH80/12272687323.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/ggbjhjG/86687256403.pdfIn PDF document text
    • http://sanadewa.iblogger.org/bhu_b._com_entrance_syllabus_2018.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/gotitibekovi/edit_email_template_outlook_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/litobegalijexetobuf.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/vipirifekijivigigew.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/free_mailer_box_template.pdfIn PDF document text
    • http://gebuzabode.epizy.com/57467406397.pdfIn PDF document text
    • http://zatunikepozis.epizy.com/black_sheep_movie_in_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/chess_rules_free.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_off0000e02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 5268 bytes
SHA-256: 603856095360a434d9d99f759a310a13d6e7b121e0a2cb6a5193ab041ca52dbe
font_01_sfnt_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 10736 bytes
SHA-256: 5e135d34aad3d5983630597494accbba98412b446074d03ff6e43357d802f6d3

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