Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd755236a88e1b5a…

MALICIOUS

PDF

65.9 KB Created: 2021-02-20 11:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fa3005a328e2d95d9ebbd77855f6ccce SHA-1: 6bf972d81db5d74bac481e5d6717389e70eb7be1 SHA-256: fd755236a88e1b5ab45a6fde2ead73138655dc2e05f166b722bc8fa00c69caf3
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://leonvi.ru/wix?keyword=coleman+pop+up+camper+parts+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372076/normal_5fcdbe9ad39d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443803/normal_5fe083dca4ac2.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/68a3e979.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/nawosineromigi/coordinate_system_in_surveying.pdfIn PDF document text
    • http://wekidezeze.epizy.com/windows_10_feature_update_1903_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/sukaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/55693781020.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/25038598278.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/asian_airline_stewardess_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/bullet_raja_movie_720p_bluray.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/cercle_de_la_forme_batignolles_programme.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/69992527797.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_off0000c35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35A 4984 bytes
SHA-256: 33969ce3787db63fbb5013c3e9a3e6c1152eb97b131e064bc2eb519122f6129e
font_01_sfnt_off0000d428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD428 12272 bytes
SHA-256: 04b61d3e94a547ef830ae76041f3ba7bd1f98d9987a0de2249e2a7e00a833d0b