Malicious PDF — malware analysis report

Static analysis result for SHA-256 9591171518ea181f…

MALICIOUS

PDF

131.6 KB Created: 2020-12-24 05:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4ae678d0f1193ae6c328ae047a482e3c SHA-1: e3566a683873227e6555c63e7dd5560c5d837cf9 SHA-256: 9591171518ea181f6a49209ee9f2c89e06e094270fcf89d8efc25372daa20912
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links suggestive of a link farm. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be the distribution of a large number of links, likely to manipulate search engine results or to lead users to malicious content, as indicated by the ClamAV detection of Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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.
  • 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/123?utm_term=pathfinder+2e+sorcerer+guide In PDF document text
    • https://seporulakokifo.weebly.com/uploads/1/3/4/5/134590723/sizazutogevopenav.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/TzXAheg/wink_news_naples_weather.pdfIn PDF document text
    • https://didekupava.weebly.com/uploads/1/3/1/1/131163833/8635615.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/gjnfaai/nuluverowos.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/ef7b53a36feb2.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/gipesi_pujivasa_kodezawesukovo.pdfIn PDF document text
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/ebdaeea4.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/igAjeQz/fofefavokozegatekaxak.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/0770009e-a3ba-49a2-97e0-aab9640b7809/nomefasutenuxefejafus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2e03de-f9bc-43ef-aa9d-00f44cb987e3/3035666784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81e8acb-00e1-4820-a72a-6fe0f2080d21/xolozoxasajimotewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeed68c1-0ede-474a-a265-b17b23a476ec/twelfth_night_act_3_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8337758-d176-4863-a1a3-8c3cb9143c70/etapas_de_la_ovogenesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2a005da-d511-42ed-bd53-64e51b8e20b3/30193167320.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E8A 5300 bytes
SHA-256: 17c4fe1e0b5393ec68a234e7db4284ea294d7b85af77da35f5ea04d543f40eec
font_01_sfnt_off0001a108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A108 5268 bytes
SHA-256: 5ec672452ed06dfe36c01dbe3dd6cfe4c34e83655bf9c94327fc19386b5d8201
font_02_sfnt_off0001b2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2E1 12268 bytes
SHA-256: 33178578d7a3c5e9193167eb21cde3588eadd8acf18ac07d44490a6c49657fa5
font_03_sfnt_off0001dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCEF 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_04_sfnt_off0001f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1B6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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