Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cfeedc67f56db6…

MALICIOUS

PDF

83.0 KB Created: 2021-02-16 21:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f149d6219d98e79166b6a6f25ac67958 SHA-1: 487f4a8be6db2c32966641fe9d6047ecc7b87526 SHA-256: 06cfeedc67f56db641495d7d72757af38b592768bba76c51c4be36886e948482
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'bologen.ru' which is associated with a keyword suggesting a download lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting a phishing or malware distribution campaign. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

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://bologen.ru/wix?keyword=ultimate+multi+tool+mtk+apk+download PDF link annotation
    • https://jizenovu.weebly.com/uploads/1/3/4/6/134682428/widufo-xonekilorafox-sefuf-xalaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5ff7b87367cd0.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/mugunovafepibi-xozavobakusure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_602af924e7a7e.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/qXphihe/jikipukivisaloxejaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/FalhbXV/66659477618.pdfIn PDF document text
    • https://fezemopozopedet.weebly.com/uploads/1/3/5/3/135326879/1e3039004bbb9.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/gapisozeroranojox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505363/normal_601ff739891ed.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/suxiweke/anhydrous_ammonia_safety.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/53364961063.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/mercado_livre_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/2988934485.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/dragon_nest_sea_leveling_guide_60-_70.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/71410368800.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/dungeon_master_guide_3._5.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/hello_brother_movie_songs_video.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/augusta_masters_course_guide.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_off000100ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EA 4976 bytes
SHA-256: 62e31b2bc237f58896243be4917623b4d5750a43f475d1e54e7bc9dac221c838
font_01_sfnt_off000111d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D9 14236 bytes
SHA-256: 836c272f92d4fac2d6fe991089b62d4928505260e78b879c48475413e00f9117

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