Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4aca6497833277…

MALICIOUS

PDF

66.7 KB Created: 2021-03-01 16:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8a2e3d4fe4c4fd2533ef034c0144ab79 SHA-1: d774f6318588fbce200390508148236de98e020f SHA-256: 6e4aca6497833277f2af32b77459685a2ac5d5432752b41af0df741204933335
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://dafemum.ru/wix?keyword=swords+and+sandals+crusader+full+version+unblocked In PDF document text
    • https://cdn.sqhk.co/runolisor/iejcjhk/kaiser_permanente_employer_address.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5fe77b80cc120.pdfIn PDF document text
    • https://cdn.sqhk.co/mibolujo/giggKgi/is_amazon_music_included_in_prime_student_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/daghgdn/57742081818.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/ehd3h3O/96264040710.pdfIn PDF document text
    • https://bopovajo.weebly.com/uploads/1/3/5/9/135966354/6578035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470221/normal_5fde6226736a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_600e7ec11da38.pdfIn PDF document text
    • https://defiduzumuxel.weebly.com/uploads/1/3/2/6/132682342/zanezisaxul.pdfIn PDF document text
    • http://setakini.22web.org/jexijubelirasukirodaxaper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420034/normal_5fcbbc3e6557f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_601441f5b777e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422145/normal_5fd9a47ab52d2.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/gaxaxufajijeloj_moweduf_duwog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5fdbc4cbe9781.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fulawumobolofog.epizy.com/abrsm_cello_grade_5_s.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/minecraft_0._15_0_full_apk.pdfIn PDF document text
    • http://fibajufe.rf.gd/percy_jackson_battle_of_the_labyrinth_chapters.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/xafifodefadusovafiv.pdfIn PDF document text
    • http://bimivopi.epizy.com/bgt_2019_x_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/tevugudojitig.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/36360503.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_off0000c73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73D 5472 bytes
SHA-256: 544e5b081c127aae83edc26d1755fb768c16bfb1a0d68167dc5fb0e4c3aa21ff
font_01_sfnt_off0000da02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 10304 bytes
SHA-256: 72334451d5882dd818012083d0efd1dbb1548695b2522259402ee7acb4fbc8c7

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