Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e2ebd115ee575a…

MALICIOUS

PDF

64.9 KB Created: 2021-02-22 09:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2858d85cd61f42aea7d94f6c897b4b29 SHA-1: a0d92f1ed88978b62bc7661e79ce8268f2ab5ace SHA-256: f1e2ebd115ee575a08fcf23e3810cf9f45b6736f1b7d62762d7d4bfb00ed74df
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=descartes+error+audiobook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477916/normal_5fdb5f897690e.pdfIn PDF document text
    • https://sonujeti.weebly.com/uploads/1/3/0/9/130969686/9739463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500882/normal_5fcbc6101e8f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471948/normal_5fdfba87177f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_601c7d461af74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_6001b189da0c0.pdfIn PDF document text
    • http://stebsmeh.space/monkey_d_luffy0bk9y.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/gcJifw8/76620735799.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/0b74fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482188/normal_6009503a6037a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_6022223633ba5.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/dazuxujepov/pedipazele.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/122577716.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/september_earth_wind_fire_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/totuz.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_off0000c1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B0 5104 bytes
SHA-256: 2e5cacec7a5d050a861da9075f96650181ed31f128129729d49624cbcb4ead4d
font_01_sfnt_off0000d31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31C 10652 bytes
SHA-256: 9dfa0db2fd5ff1e5ec01da10da78fa370099ddc9c83bd2235e36d0ac46c399b4