Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c15d44f9e12ba5…

MALICIOUS

PDF

71.3 KB Created: 2021-01-24 14:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 77c3b7a787070eee0cbcb984e9bc4a6f SHA-1: 3219a3acdbaa9eb7ccc8c818e9023219a68563b0 SHA-256: 15c15d44f9e12ba5b6804fe6c9ec59ed540a49de156fa671416103b3052554e6
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://yafferge.ru/wb?keyword=splash%20canyon%20crystal%20caverns%20level%2011 In PDF document text
    • http://bevibopo.22web.org/railroad_retirement_board_form_aa-_1.pdfIn PDF document text
    • http://dedarijaluwonu.22web.org/xupoputidekazodiwuxu.pdfIn PDF document text
    • https://wisatevifo.weebly.com/uploads/1/3/0/7/130775851/6696434.pdfIn PDF document text
    • http://top-shop-store.website/joligqa5l3.pdfIn PDF document text
    • https://tifomuzaki.weebly.com/uploads/1/3/1/1/131163977/megigoxikenej.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/9531842.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/4gjCjiC/79790880486.pdfIn PDF document text
    • http://bridgecommerce.com/change_notification_sound_android_app21hez.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/4940137.pdfIn PDF document text
    • http://bavunexebiri.iblogger.org/bosch_800_series_dishwasher_repair_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/UpedhhG/47383849139.pdfIn PDF document text
    • https://wisemawuperu.weebly.com/uploads/1/3/0/7/130738751/fesiperamu.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/1648552.pdfIn PDF document text
    • http://sun-italy.space/ice_cream_blast_free_match_3_games3mag9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/54579495944.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/82762277478.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/24491543715.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/26376170608.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_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 5340 bytes
SHA-256: 7dc77220b29295307f162ac07d705eaf28183a427813f5068c2a36375b5e655e
font_01_sfnt_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 10636 bytes
SHA-256: 2d984a05c8f32a7e1f69060425376908ff0f52523fea82b408c9a93b50960bb7

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