Malicious PDF — malware analysis report

Static analysis result for SHA-256 e960df2812398207…

MALICIOUS

PDF

61.3 KB Created: 2020-11-11 02:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: b11dab6fa06b93768263d0a94de00b61 SHA-1: d82fd377746c2952b103b770d5d8087439555d85 SHA-256: e960df2812398207fbdf75a1f216055fbd0e7607d8cf38e2b67d594e011836cb
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/aws?keyword=rate+my+professor+csumb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485927/normal_5fa8f43d5f98b.pdfIn PDF document text
    • https://luleloneluso.weebly.com/uploads/1/3/4/4/134450102/vemuvom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5f9f01066022c.pdfIn PDF document text
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/lufon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f8fbd6c520ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5fa1a3f43ff38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/915eee82-dc95-4a29-b7ea-ca76204596ad/clave_de_producto_microsoft_office_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0beef6-1762-4f87-86e0-ae5ed1ed8bb9/isotope_notation_for_lithium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c7a35f-19e0-4709-8dd4-60aa63b035ea/shelley_carson_tu_cerebro_creativo_p.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/dnd_5e_spells_phantasmal_force.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/ge_profile_washer_ptwn6050mwt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/personal_pronouns_worksheet_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8228d0f2-e741-49e9-8b72-4d67b313fd58/81048156671.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D5 5108 bytes
SHA-256: 01c8b62031f1d07e9b1b34d63fdbd62b8062742093723014ccbe2f6973e5d2bf
font_01_sfnt_off0000ba40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA40 9452 bytes
SHA-256: f1ef5222e968a234214ddc5392dddbf54fe69b12d8c2e62e4f4d1e740ff6f121
font_02_sfnt_off0000da97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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