Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8c576ed49cdf8b…

MALICIOUS

PDF

71.3 KB Created: 2021-02-05 07:05:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c424a74de32ae0b275d580854438050d SHA-1: d2a1635889dff3231f06de12070c8f4e83d1450a SHA-256: 7f8c576ed49cdf8b10ee2e5fb086b2eaf47eeab0179e518350f82620c1b5af10
234 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=science%20careers%20list%20a-%20z%20pdf In PDF document text
    • http://bilkaita.space/concave_and_convex_mirrors_questions_and_answershvx5i.pdfIn PDF document text
    • https://cdn.sqhk.co/kubibosujiko/iFajiQg/harry_potter_hogwarts_mystery_clubs_energy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_5fdbaa6937bc2.pdfIn PDF document text
    • https://cdn.sqhk.co/gadakoferupa/4pQjdTX/37778958201.pdfIn PDF document text
    • https://cdn.sqhk.co/fonixoligem/BOYhejg/muvegat.pdfIn PDF document text
    • http://dkmz3.club/heart_piano_tiles_pink_apktyycv.pdfIn PDF document text
    • https://cdn.sqhk.co/fekolisuzub/fm7jhgh/tonuvanepulupejotul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463264/normal_5feb9d76ab67b.pdfIn PDF document text
    • http://ideaita.fun/radical_hope_jonathan_leary6sje.pdfIn PDF document text
    • http://paganel.world/resuvogadidategopiragikerxvccv.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/jevopemosod/jaisalmer_fort_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/lavadora_brastemp_ative_9kg_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/46189169730.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/50492678926.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/98160246556.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/lubimukelexafotosewub.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/51271901925.pdfIn PDF document text
    • http://posugez.epizy.com/buccal_smear_examination.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_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 5336 bytes
SHA-256: 198c00dae329950d8093b0045f1c97e8939057d31d898a235fa999507abb9e42
font_01_sfnt_off0000e68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68C 12848 bytes
SHA-256: 84dd9b549141b1e4117bfd104ed35a6504559f0c3e0b0d4f0d7196e91e7f09ed

Open this report in the interactive analyzer, or submit your own file for analysis.