Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a213bd2c96b1b9…

MALICIOUS

PDF

80.4 KB Created: 2021-04-06 01:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 623849dda66d63d22ef87391943ee064 SHA-1: 56a3d46bdc0a21144bc7911533838c9df555cdef SHA-256: 59a213bd2c96b1b98a3151ecef039142d81e5b714a69032eadd4d9167c1990fb
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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://lozipotod.ru/strik?utm_term=internal+audit+vacancies+in+durban PDF link annotation
    • https://wekupadafar.weebly.com/uploads/1/3/5/3/135315244/giperosineluloba.pdfIn PDF document text
    • http://idealicaitalia-official.site/97893615290h34gh.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuworano/2gDhfig/get_instagram_followers_free_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/jeGhjNW/hd_wallpaper_new_2020.pdfIn PDF document text
    • http://tublitalia.space/jujatubigozeforoxonoh3bab.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/2538372.pdfIn PDF document text
    • http://uscovidcharts.com/18823735681llp65.pdfIn PDF document text
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/fidapekemix_pesuxu_kumujalogime.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/hjgljiC/homescapes_level_2443.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/fGhgYpb/91782911170.pdfIn PDF document text
    • https://ruxosegid.weebly.com/uploads/1/3/4/2/134265817/a8c4cb5e0af63.pdfIn PDF document text
    • https://sotinele.weebly.com/uploads/1/3/4/6/134640455/5dc2cb97740.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/wonukepunudigedod.pdfIn PDF document text
    • https://cdn.sqhk.co/xidujefonari/eih7Ujg/jugar_hnefatafl_online.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://s3.amazonaws.com/bajuse/paiya_cut_songs_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/7526302392.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/craftsman_10_inch_drill_press_laser_trac.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/wunovigofewad.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/kuwitebuwovizibixenevuma.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_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 4844 bytes
SHA-256: ebf2c470d206d65cc8b4e884c27e41a3ef6e368292c28e666fddff2f75e30184
font_01_sfnt_off0001013a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013A 10896 bytes
SHA-256: af269caa8fa01b3ed864c49f12286f28a542bb6eeb291b2d9d0bda4854f34cde
font_02_sfnt_off00012664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12664 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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