Malicious PDF — malware analysis report

Static analysis result for SHA-256 40115f7e840388d7…

MALICIOUS

PDF

73.0 KB Created: 2021-02-28 03:00:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 78c5c0b688c1a3291cd0e764783de369 SHA-1: 14d153944a5bba20b392bdededfeee1e16547e79 SHA-256: 40115f7e840388d73b0df6a7dc365471995daf3c2c78a6c7fe8cb77d25b5842a
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://leonvi.ru/wix?keyword=kentucky+natural+resources PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426418/normal_5fec7523c5379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459776/normal_5ffeb227644f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fd67e243d612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492546/normal_5fd65e8a413e6.pdfIn PDF document text
    • https://mutikotamibe.weebly.com/uploads/1/3/0/8/130874320/baxupikolaremiw_dozud_wenemaxikenud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_602ef96631075.pdfIn PDF document text
    • https://tarakemutelomul.weebly.com/uploads/1/3/2/3/132303353/jawon_jetasalarag_vuguja.pdfIn PDF document text
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/rupuruz_kimipubipuna.pdfIn PDF document text
    • http://dabutaxezopis.iblogger.org/6171558801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402294/normal_5fe07dd29ab7f.pdfIn PDF document text
    • http://megarafulosibef.22web.org/naretogovedas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411701/normal_6003eb95b3466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_5fdbcf1227a6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369160/normal_5ff76456b1fac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484806/normal_5ffeb45ac3433.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/7347935.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425224/normal_5ff03cb6bed45.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/wegugus/gizumunezakero.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/69717693879.pdfIn PDF document text
    • http://xuxivobanirug.epizy.com/recruitment_process_plan_template.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_off0000e202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 4928 bytes
SHA-256: 12fd540e1a41b3740e0e57b4835edeafd9126b73d71ff4ea72fc01360589280a
font_01_sfnt_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 10612 bytes
SHA-256: 78e35c86f7201671d058335dea31787c4da22b8e1a2e0c382787827aad05f9ad

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