Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f13b3c0f55de15…

MALICIOUS

PDF

72.4 KB Created: 2021-02-13 23:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e8d86033cb023884d207380eb1eb2cb0 SHA-1: ede4e55e31e56c2b9f01c17d4b48da75a765dfc1 SHA-256: a8f13b3c0f55de15e51a353bf381db665196980c8eb955200c4223b48307ee79
254 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=world+of+tanks+blitz+mod+apk+revdl In PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/cgjuVha/life_and_death_twilight_movie_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5fccf580bcd82.pdfIn PDF document text
    • https://riginujer.weebly.com/uploads/1/3/2/6/132695799/494bc858842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_601888c002fb0.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/hjcgjia/fatal_fury_special_super_nintendo_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/hg5HnKl/noxutexafagafave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487916/normal_5fed94419d4b2.pdfIn PDF document text
    • https://cdn.sqhk.co/vimitewimuwi/WigyEhh/endless_run_lost_temple_oz_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/7Dwrhcr/64074051287.pdfIn PDF document text
    • https://cdn.sqhk.co/bibolaned/eXIZgeQ/methode_swot_projet.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/jaKhfZ5/35861240097.pdfIn PDF document text
    • https://xodisukuzoki.weebly.com/uploads/1/3/5/3/135390210/vegabanopen_zolotep_zufamesub.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/ea4jchf/56410722233.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/jgjUN76/turobaxi.pdfIn PDF document text
    • https://faxojoduso.weebly.com/uploads/1/3/5/3/135351685/rubutuxafuzumuxusom.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/jikopot/pubemonivelalukuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/indian_classical_instrumental_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/wokefajovimozebuwisiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/12338720408.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_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 5516 bytes
SHA-256: 06aaf924ca4aef50a1b073d00ed058a5163689bda7b3d39c30ee47c1f5c4d852
font_01_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 10460 bytes
SHA-256: 4563c8ffa03849e6e57a60b61ec251b80aa674262fef62ae2a9bbfc26fdfa266

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