Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc729f678d6201bd…

MALICIOUS

PDF

76.8 KB Created: 2021-02-22 00:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8c89b6a11d36c1033bdef7d244757e33 SHA-1: 0c310783f455810d8e3e2552f4ba0ea766e6e873 SHA-256: cc729f678d6201bd115c0cb211785a31dbc91c0af1184e5de3870b036dfcd9d9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. ClamAV and ML heuristics confirm the malicious nature of the file, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=revenge+in+hamlet+act+2 PDF link annotation
    • http://chempion.coffee/foxebopajh4xi1.pdfIn PDF document text
    • http://votixowet.22web.org/senuduzumiwumegugupuvotol.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/nysig4U/guide_for_johnny_trigger_sniper_mod_apk_revdl.pdfIn PDF document text
    • http://netlysy.online/composite_materials_wikipediah38mn.pdfIn PDF document text
    • http://venovagom.iblogger.org/8098327019.pdfIn PDF document text
    • https://furivupes.weebly.com/uploads/1/3/5/2/135295821/86b19f64a306d.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/JhgYNgf/oracle_colorshift_2._0_controller_installation.pdfIn PDF document text
    • https://tipuxefisabe.weebly.com/uploads/1/3/4/8/134846761/zewixe_fofopamiku_gomixoxaraxiziv_puvimavam.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/WhccOAd/flippy_knife_hack_apk_2020.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/pobixedele/100_names_of_allah_video.pdfIn PDF document text
    • http://lofadekiwi.rf.gd/occupations_vocabulary_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/conversion_de_milimetros_a_pulgadas_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/algebraic_projective_geometry.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/16699805240.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/cen_cenelec_guide.pdfIn PDF document text
    • http://mudotepejix.epizy.com/firth_of_thames_fishing_report_2018.pdfIn PDF document text
    • http://momerulazem.rf.gd/90244957936.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/accident_report_today_n4.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_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 5140 bytes
SHA-256: 1f92941d00dd25d26515f73190cf5dadb3e89c00fad0cb04078bca5a695d8527
font_01_sfnt_off00010294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 10492 bytes
SHA-256: 55a32334bcdd8e448a67bee6dcbfd2324a6a7dd438512489ab57ce4633736479

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