Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f692517deb06fd…

MALICIOUS

PDF

67.9 KB Created: 2021-02-11 05:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a9b17c1d051ba839cf43db8901d670fb SHA-1: e654180dbb20e478405a42eebbe5feffdad8e07c SHA-256: 39f692517deb06fd72079fb9c4e28b12e7088d2f11a39e1ad169ddcc06071a19
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://jacksth.ru/wb?keyword=voltage%20drop%20calculator%20excel%20format PDF link annotation
    • https://cdn.sqhk.co/moxibusas/umijEgf/tik_tok_app_download_link.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/egjpjhh/ultimate_wolf_simulator_2_apk_mod.pdfIn PDF document text
    • https://punopofogow.weebly.com/uploads/1/3/1/4/131437229/nexuxexidodutop_xifalixituva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401558/normal_5fe174cd47747.pdfIn PDF document text
    • https://fobinoxibenor.weebly.com/uploads/1/3/1/4/131437242/bamiwudili.pdfIn PDF document text
    • https://jitolabifu.weebly.com/uploads/1/3/1/6/131607188/984e9b.pdfIn PDF document text
    • https://banabujoro.weebly.com/uploads/1/3/0/7/130776007/2223598.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/TidEieq/play_super_text_twist_free_online.pdfIn PDF document text
    • https://wigikezidewuti.weebly.com/uploads/1/3/4/5/134578964/5819a23933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472788/normal_5ff1956c65b3d.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/sinadi/jexezojawiru.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/icomania_answers_level_43.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/ielts_formal_letter_sample_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/diferencia_entre_derecho_ecologico_y_ambiental.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/giburisutakavimetosu.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_off0000c85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85C 5332 bytes
SHA-256: 53ba45fcbfca7fd9ee82fd307f49133452d28595d75a3405cbadb7a8970a7c25
font_01_sfnt_off0000da78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA78 11768 bytes
SHA-256: eb2af4848b2c6529e7e76ad5a844fa22169f960bc5c758f5caf436bb9cb04248