Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50815920c1ed4ae…

MALICIOUS

PDF

84.7 KB Created: 2021-04-04 16:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9f46fea89b30fe44df9292ce8e667ddd SHA-1: ec9c09ca8fdd972f6053a52041ec454f5ba3641f SHA-256: e50815920c1ed4ae9fc1a9979c61f92d8c59cffcdf70a6323388885ed23cef0b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the lure of a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://pelibifir.ru/award?keyword=arduino+uno+spec+sheet+pdf PDF link annotation
    • http://my-credit.info/pokedoxasaxibubaboxelow6hrxy.pdfIn PDF document text
    • http://agentsecure.space/definition_of_research_by_scholarslqzw9.pdfIn PDF document text
    • http://mnogoturov.com/sling_box_m1iy05g.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/7ggOojb/whatsapp_video_status_song_new.pdfIn PDF document text
    • https://cdn.sqhk.co/tolebilu/hgjrwhf/amc_30_orange_county.pdfIn PDF document text
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/tefedefomamelovu.pdfIn PDF document text
    • http://faceit.su/32173112741r1y9f.pdfIn PDF document text
    • https://gebodakejodige.weebly.com/uploads/1/3/4/3/134316683/minotagesovudeget.pdfIn PDF document text
    • https://bovimifukid.weebly.com/uploads/1/3/4/8/134882826/faxiwemuwu.pdfIn PDF document text
    • http://requiredjokblog.com/2299641733inz3u.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/cFhhHeW/xavoboxavisev.pdfIn PDF document text
    • https://vewenaloviriwu.weebly.com/uploads/1/3/2/8/132816087/71214842bb407.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/ih2ykja/airtime_watch_together.pdfIn PDF document text
    • https://jerigarapo.weebly.com/uploads/1/3/5/3/135327201/4a948f.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/genijusemu/72430807222.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/descargar_la_condicion_humana_hannah_arendt.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/kedobisevagopupekaru.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/13552176043.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/is_structural_stagnation_a_keynesian_or_a_classical_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/52832948375.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/31402343091.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/thinking_like_an_engineer.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/niv_bible_large_print_single_column.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/92615937659.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/sisejixilibatomoxevut.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/what_are_the_names_of_the_notes_in_the_middle_of_the_grand_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/uscg_height_weight_standards.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_off0001005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 4872 bytes
SHA-256: afc088fdb4c833c02ede2f5107adf39a598234026359ddff0130224176184e40
font_01_sfnt_off000110e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E0 11172 bytes
SHA-256: b0a94fcae5685ac2f205a9fa6d5cb6c1784dc1a39fe2c6850d24dfa59addf848
font_02_sfnt_off000136c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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