Malicious PDF — malware analysis report

Static analysis result for SHA-256 642e2adeae494a22…

MALICIOUS

PDF

71.8 KB Created: 2021-02-19 17:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c6acb6c0b95b1d150ed2eb04a5e1acf3 SHA-1: db9553af3af43710ba86d61eccfe565ebfb74cbc SHA-256: 642e2adeae494a22921af5e096c6eb75ad13a84150be7f2500979adab0279b59
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/wix?keyword=513+area+code+location+us PDF link annotation
    • http://rimowew.22web.org/cengage_publication_chemistry.pdfIn PDF document text
    • https://femukigiterabe.weebly.com/uploads/1/3/2/7/132740239/2894830.pdfIn PDF document text
    • https://sobuxiba.weebly.com/uploads/1/3/4/8/134867950/13f8b00e481f71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495391/normal_5ff2f1a109771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_5fdc42022fd44.pdfIn PDF document text
    • https://doguxugufini.weebly.com/uploads/1/3/0/7/130739878/guvuvugexeboj.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/meludav/petronas_dagangan_berhad_annual_report_2018.pdfIn PDF document text
    • http://kafozubasopuji.rf.gd/lexus_gx_460_luxury_2015_price.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/english_to_tagalog_translator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/18733824053.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/34247924829.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/21882034302.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/top_audio_converter_for_android.pdfIn PDF document text
    • http://bugavujozi.epizy.com/vibajiwopotizedapu.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/nms_indium_farm_guide.pdfIn PDF document text
    • http://diresudavu.rf.gd/best_light_novels_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/printable_multiplication_math_worksheets_for_3rd_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/smoke_background_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/tuwipedolofijuse.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/44259726530.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_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 5180 bytes
SHA-256: 2ae7901dc1f70508b14254ad9d0241408cedea7b434ce0e90bbd62c343978e75
font_01_sfnt_off0000ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 10244 bytes
SHA-256: 100ee4d2d1b34f31098f91b17a08af0ce4cb04f3cfbbfbbb4a7d3cb692d3a9cd

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