Malicious PDF — malware analysis report

Static analysis result for SHA-256 954a787303b8226c…

MALICIOUS

PDF

68.2 KB Created: 2021-02-15 07:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ce7c6e5b8b7901fed1dbc0610417188b SHA-1: a77796d51d037114d06d14ddd765374e5509aec2 SHA-256: 954a787303b8226c2ff07bda568b8a6b9d01f1a3d971a26dedaf205c491d5986
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/wix?keyword=administrative+assistant+handbook+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389355/normal_5ff988119e235.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/2da496e2ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_5fdb344ff13d4.pdfIn PDF document text
    • https://povobaza.weebly.com/uploads/1/3/4/3/134383372/kavosipexawo_nemisepefoxo.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/suvek_xorolubedupade.pdfIn PDF document text
    • https://pinobuni.weebly.com/uploads/1/3/0/9/130969003/7010285.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/3986627.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/ajcVsii/52205202603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419002/normal_6002449ece5fd.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/jj2lTfG/5158950631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_6027bbdc7eda6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fc5f05b476b5.pdfIn PDF document text
    • https://lokanasa.weebly.com/uploads/1/3/5/2/135299929/2746730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_601993a721e07.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/jitimesolagun/bug_report_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/cuneiform_bone_fracture_x_ray.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/pulse_code_modulation_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/ffxiv_fishing_collectibles_guide.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_off0000cf54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF54 5500 bytes
SHA-256: 4c5bd672ed0bfab35bc1a28a0f8d4c2bf50e4822e05c7b1320e82f18a915993c
font_01_sfnt_off0000e1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DA 9764 bytes
SHA-256: 7002152f253bccb4a0b98e2162901e5520aa179d3b79b86bd86ccd7876ef7674

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