Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a6e8d7fa372b6a…

MALICIOUS

PDF

72.2 KB Created: 2021-02-18 08:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4bcc9ce14aea42534f298fdcf355b5cc SHA-1: 89eaf5339efcf869288543f690aa22f275f32df6 SHA-256: c3a6e8d7fa372b6a2d02e4ff7d2b2b4ce87864610e7746e4a76e93fad47aa51d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=phrases+and+clauses+worksheets+for+grade+6+with+answers PDF link annotation
    • http://asia.kiwi/nodulo_de_parotidanobqp.pdfIn PDF document text
    • https://bugasezafefadi.weebly.com/uploads/1/3/1/6/131637254/9564976.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380539/normal_5fe49758dc6da.pdfIn PDF document text
    • http://inertbhjbj.ru/dauntless_beginner_guide_20180p5re.pdfIn PDF document text
    • https://xamivozafuju.weebly.com/uploads/1/3/5/3/135308546/sirametiwaxo.pdfIn PDF document text
    • https://visizejafu.weebly.com/uploads/1/3/6/0/136093068/garubevibesi.pdfIn PDF document text
    • http://leopards.space/rapozozui8ad2.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/wugisitudazajaletuxewe.pdfIn PDF document text
    • http://ihsteam.ru/594790501916pxc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450427/normal_5fca92622df60.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/adidas_men_s_shirt_size_guide.pdfIn PDF document text
    • http://madewithsunshine.com/worasuzewobojupusizamigo0qx.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/ruxidevanazo.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/11417587527.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/zogirare.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/35214259779.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/beyond_compare_tool_for_windows.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488566/normal_5fc7368fac0fb.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/interactive_geography_workbook_answer_c1.pdfIn PDF document text
    • https://wibabuxef.weebly.com/uploads/1/3/1/3/131380054/vusemupina-bupujobakuzab-sikazeba-rixiwoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/15815823306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD19 5596 bytes
SHA-256: af86c7a6f959ce2ec886c34625ee8589bda6a0a32e8ea911d6b1df3bb1821759
font_01_sfnt_off0000f02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 10212 bytes
SHA-256: 1c04371cfaed7cab19199e04e776ce18229c351a047bb9a719b3a32d56ba2bc4