Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6746b4de344ff16…

MALICIOUS

PDF

73.2 KB Created: 2021-02-27 18:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c1b15ef2162c97d63627bee258fe5dfc SHA-1: 6c13586b08b57beb3e4689a182ee0c3d2fe8d9f8 SHA-256: f6746b4de344ff166476d86f8cc1d440a8993c1c7a69c2b7ab0de11315a546bc
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/123?utm_term=halfling+name+ideas In PDF document text
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/683a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455884/normal_5fc96bca778da.pdfIn PDF document text
    • http://xadimilok.iblogger.org/best_browser_for_mi_android_tv.pdfIn PDF document text
    • http://depovujakav.iblogger.org/one_summers_day_cello_and_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/heiaqgj/26641209645.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/jdhhgie/batobigenifav.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwune/gjVgcHs/rapunzel_disneybound_dress.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_6033d9a6b4243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461780/normal_600a73ca1882c.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/hg0XhhW/21711582094.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/icGhiib/great_lord_mastery_skill.pdfIn PDF document text
    • https://dibatavuxod.weebly.com/uploads/1/3/0/7/130775672/vubegolov.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/o7gdXtO/airtel_dth_recharge_plans_delhi_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seboraka.epizy.com/kurutepobuxiw.pdfIn PDF document text
    • http://vugofixev.rf.gd/business_for_beginners_book.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_off0000de5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5B 5092 bytes
SHA-256: 547cb43fca22ae5d2717128e4b1a08b9c4ae5b482b40d273daf1e6b567b99d07
font_01_sfnt_off0000efa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 12464 bytes
SHA-256: e8faa552aed1ef3eb10a6d9ba2fe64ccea3acc3a433da9f2e4b421d78c2dcd36

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