Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b30f943979cc97…

MALICIOUS

PDF

76.4 KB Created: 2021-01-23 20:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 66b7577190c73df6ffa2f5d572ff37c8 SHA-1: b95702e78b424afe6ab9be9dd642450613afae1f SHA-256: 63b30f943979cc97387504dde62daf1c10e16b03075036e60ba45bebe8ebe600
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://jottigo.ru/aws?utm_term=form+8283+noncash+charitable+contributions PDF link annotation
    • https://cdn.sqhk.co/fejisedetu/34mn9kl/kubicki_bass_electronics.pdfIn PDF document text
    • https://kesuwevibumeju.weebly.com/uploads/1/3/0/8/130814845/1903175.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368251/normal_5fdef4dfb1f50.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/3ic0rDH/jebubib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_5fd8b2cc0baac.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/Shhjh90/zamobijimevogomewadiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505096/normal_5ff64b470711b.pdfIn PDF document text
    • https://cdn.sqhk.co/legesizas/pigiegi/word_board_games_for_adults.pdfIn PDF document text
    • https://fuxiwuzepideka.weebly.com/uploads/1/3/1/3/131381491/gemepob.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/3Usjhja/uptv_original_movies_list_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375357/normal_5ff9f143109ec.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/fVJ4Chb/68581444215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371267/normal_5feb7667a3ff1.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/6eQjbiw/95231179497.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/lowebemuwojiso/end_of_formal_letter_english.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_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 5624 bytes
SHA-256: cbc459016d8db6bcd1dd3a06b4074f06c6a62a7a8d6487b8c60d6f1c1bcabe2a
font_01_sfnt_off000100aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AA 10660 bytes
SHA-256: 62ab58aa00e97af64ae79d53651c275f597a7e0ff769b5f41a8d0bdff214a853