Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ceff58383f87c4…

MALICIOUS

PDF

67.9 KB Created: 2020-11-30 10:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cc509f617e3979d2098d184e736e6125 SHA-1: 812d9a1f07ba997d9b99d90ac8ba007365c0f7fc SHA-256: 26ceff58383f87c4e7be7b6c47d898194406ded56c0e6a462ac084dae8cb2d1d
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://traffine.ru/aws?utm_term=chives+planting+guide In PDF document text
    • https://zovuwiveja.weebly.com/uploads/1/3/4/8/134880504/nutemugatu.pdfIn PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/3765637.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/gipijepaborakon.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/f5ff696fcfc.pdfIn PDF document text
    • https://loromosukatilif.weebly.com/uploads/1/3/4/7/134774062/8166512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7bc9cd-a98a-4657-988f-4142ce1d0566/91098804767.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ctet_answer_key_2019_paper_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a53080aa-d1f6-4fd2-893f-6f9e09220108/marks_basic_medical_biochemistry_5th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/wings_of_fire_book_in_hindi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/antivirus_for_win_xp_sp3_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/angioedema_hereditario_fisiopatologia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f23f6fe-3f1f-4e4f-bfd1-7ccc41b59304/rosario_ala_sangre_de_cristo_origina.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/former_nba_players_from_chicago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab75ffea-7c3e-49dc-9605-2bb3b79ef05c/84193702710.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/video_browser_for_samsung_smart_tv_android.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_off0000ceca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 5088 bytes
SHA-256: 1405762ceef40528bec78aea2ed1474dd18700d2c57c5cacd6208d61a7984ed9
font_01_sfnt_off0000e021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE021 10188 bytes
SHA-256: 2f9b6c74ba001e9f0114e9cee57a88c451038280ccb2470144d3efea9f66ceeb

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