Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a5ea7676e8db32…

MALICIOUS

PDF

72.4 KB Created: 2020-11-12 14:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e153690869994f970257dcd5200fcfcf SHA-1: 1b9926adc0b839590f0c43706ffd54b528b705f4 SHA-256: 89a5ea7676e8db32ee3d986b9cd40d9181acf99894bd8169bcc11ad7266b73ba
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=gq+dress+shirt+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5fa42ee8e2570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5fa7318a8bdab.pdfIn PDF document text
    • https://nagafijobe.weebly.com/uploads/1/3/4/6/134621550/a0dd7261.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/1e1d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f8c7c582fbb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f8b755970c8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_5f9a8e753fdc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5f9bc4dbedfce.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/745ed247-ba11-4b4e-a6fd-94932bca676d/lekewuwipitepadojur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b0be33-1282-417b-a8cb-d2632336aa3f/70563885692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ae9ef9-87fb-4164-a2de-4920761efdb8/tumuxijure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce2d5147-720b-4f7a-87aa-3293230c0f04/7066754502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e9cf2f-1dab-4025-997a-566b1e58ea52/10051605431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61bdc11d-b808-4fd3-8734-d6bc864b0a4c/bexewari.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC697 5004 bytes
SHA-256: fd7269cfb29999d33c21d7284439e88722420d559f24c4e7a6a09ff06e364672
font_01_sfnt_off0000d792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD792 10016 bytes
SHA-256: 5f8232dfaf19142b95fbd49ddf47a695cd3d2055d6800facdb317cfdc51f4357
font_02_sfnt_off0000fa13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 17848 bytes
SHA-256: e813c93d7416f7296450ce02e7226d0181c81d2fd7d88b8fe0a197fb2a83edad

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