Malicious PDF — malware analysis report

Static analysis result for SHA-256 d019b9207ec6d144…

MALICIOUS

PDF

98.5 KB Created: 2021-03-08 07:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7781a7e4b67626827a1887977de5be91 SHA-1: bb2eb2faeb02670e5b1800bfcf297693dad702db SHA-256: d019b9207ec6d144990a9f4d7109713e9ce47dcea2d4a3f2c3e3bcc8f0036199
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('xajibur.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple PDF links, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://xajibur.ru/strik?utm_term=us+history+shorts+the+first+political+parties PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488815/normal_5fc7303697e4d.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/javefetisujesanimededadir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5fd826862d443.pdfIn PDF document text
    • http://timinome.getenjoyment.net/why_is_my_honda_lawn_mower_not_starting.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/how_do_you_make_honey_baked_ham_glaze.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/garrett_euro_ace_vs_250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_601fd2bd4e9f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498324/normal_5fcaeeb4c21c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_602825ac8349f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujozidokoj.rf.gd/9928976596.pdfIn PDF document text
    • http://derizivazodox.rf.gd/wearing_dryer_sheets_in_shoes.pdfIn PDF document text
    • http://sadamenukovizep.epizy.com/tuzuzuzolojiwopukajaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbd17cf-09c6-460e-8a4e-40fe703fb708/rozurebawalopabaza.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/5274826068.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/chitralekha_ji_ke_bhajan_video.pdfIn PDF document text
    • http://rinexevijexaxi.epizy.com/wigesuzuwolaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad026f6-dece-4c7e-834b-89618cd4bfc9/why_isnt_my_skullcandy_bluetooth_headphones_connect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c212938-69ad-466c-9812-6383fef86ef2/bixivozuzikokajap.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/allen_bradley_powerflex_700_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/three_levels_of_government_canada_worksheet.pdfIn PDF document text
    • http://fufifaramulemi.rf.gd/blackkklansman_rating_parents_guide.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/webawimimoba.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/uscg_weight_form.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_off000142e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E1 5196 bytes
SHA-256: 08a3fcd400fd76ba15b20b6566d62b2a0620e6f421fdb5a4b5334af1df2472fb
font_01_sfnt_off00015496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15496 11748 bytes
SHA-256: 9c3c2e6ec70dad8a577d695fd9b5618de827d84f9c22c05b94e4a6b8aedb033e

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