Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c0d0b6f32d4740…

MALICIOUS

PDF

84.5 KB Created: 2021-03-13 22:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ed94f345fabbbf46c1ab32a04866eb1c SHA-1: be62c3a65aea49e18d734bed4ee233d545fb3ab1 SHA-256: 37c0d0b6f32d474008d97d106d637277039dd0bc1a9e19c5e4a3e1564fb1dce3
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=the+cartel+7+pdf PDF link annotation
    • https://cdn.sqhk.co/wexapitode/gR8Y2kq/93094707909.pdfIn PDF document text
    • http://liketime.fun/171250949232yed1.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/qihjbmo/fijogopoxufamakoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_604ce7bb6731f.pdfIn PDF document text
    • https://merogowaxoku.weebly.com/uploads/1/3/1/0/131069891/ronogilo.pdfIn PDF document text
    • https://dusalunefawotof.weebly.com/uploads/1/3/4/4/134487283/vawot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454045/normal_6023b1ab563d6.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/gjgKIte/sell_gift_cards_for_crypto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414871/normal_5fe4a6f7d3487.pdfIn PDF document text
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/0545bf1d4908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458634/normal_603526e21f128.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/jdlHjd8/banozunugewodesemevalokud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369524/normal_6002df5b4d4f3.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/hgifhgf/palidajijusise.pdfIn PDF document text
    • http://discount50.pro/vaperegujarobirepur59tr9.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/AjfhhbF/video_editor_app_download_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/yEhb8ig/36701460765.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/jRheeig/father_sons_discount_code.pdfIn PDF document text
    • http://mnclassis.org/how_to_add_adobe_flash_extension_in_chromeexl3m.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/e9e2a1c4a422.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/c1e24dc7-4d9b-4794-9535-b6f0eaeb2f17/soe_training_tv_programme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788178ab-65f7-4848-b439-077f53c31817/48193123428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7a92a7-b771-489b-95a9-69bc808bf62d/gp_medium_tent_army.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_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 5092 bytes
SHA-256: 0ef8e4d0f9eda9110b15581ecc2dc85494cae17fabef7e26694eea9f46fec01d
font_01_sfnt_off00010628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10628 11432 bytes
SHA-256: 171c4c40c93a54777ae976631f4d719bd2fc8e784c07ba43ea5629fd6b0015be
font_02_sfnt_off00012d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4A 16392 bytes
SHA-256: 6e2b96ce9a5294e90eaabd4ab29df5439398dd7df1adc01b11c36493c6a94b96