Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59d4a3b100cf850…

MALICIOUS

PDF

77.1 KB Created: 2021-02-10 04:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8dff15e66cd6230e146b158f727c7687 SHA-1: ff498a5c9a06eb7c5ecbb5c5641192448131afda SHA-256: a59d4a3b100cf850f9dbb6623086d3ab63eaf07c792114309cb3a7e3112e7e7d
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://baarspo.ru/wb?keyword=angular%20bootstrap%20theme%20free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393489/normal_600be1e891463.pdfIn PDF document text
    • https://cdn.sqhk.co/pavuraxutem/ghQhcie/bememe.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/hahdyuU/66776643756.pdfIn PDF document text
    • https://nudusomezuriful.weebly.com/uploads/1/3/5/3/135387444/zusodipun_xapujeripe.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/kapizoxuninajix-titoguxesige-pinilajefin-folevib.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/gegd9ic/karm_thrift_store_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/9Fl3qVY/23905681931.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/fgAg7gl/39718863996.pdfIn PDF document text
    • https://bodakipufasedoj.weebly.com/uploads/1/3/5/9/135972884/dolut-vimakuxavogoj.pdfIn PDF document text
    • http://jetavimazi.22web.org/simple_thank_you_email_after_interview_template.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/musokejixami/filemaker_pro_17_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/adobe_acrobat_pro_unlocked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/career_personality_test_free.pdfIn PDF document text
    • http://porojerosisogu.rf.gd/28980137490.pdfIn PDF document text
    • http://xawosote.epizy.com/asatoma_sadgamaya_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/destiny_2_lumina_quest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/83694063663.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/51403407774.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_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 5444 bytes
SHA-256: 04fae6b9ecde0c4b53aad4f05220910be19a436251ff4141040f8a72abfceba1
font_01_sfnt_off00010388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 10592 bytes
SHA-256: 29b1b8013b8b18772bc27910b51726ecc38e5435afb75b3d82b45ce348fe17ea

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