Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ab7c4210986a50…

MALICIOUS

PDF

74.4 KB Created: 2021-02-20 22:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d92cd10c760a968d72df20d91d74bcf8 SHA-1: 57a175422f5aa959b4ef7932dbb3712aec415b8d SHA-256: 53ab7c4210986a50dc5c3746b72584e37d75d3ac51a4b26c71aa31be39cc5aa1
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/strik?utm_term=what+kind+of+battery+for+minn+kota+trolling+motor In PDF document text
    • https://jasoveloxera.weebly.com/uploads/1/3/5/9/135967924/6779385.pdfIn PDF document text
    • http://bluebadgeform.com/winninghams_critical_thinking_cases_in_nursing_6th_edition_answersx3w87.pdfIn PDF document text
    • https://fafotarume.weebly.com/uploads/1/3/1/0/131069904/9800998.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/5175146.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/rajakazurepuoet5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5ff427c060031.pdfIn PDF document text
    • https://warasogufav.weebly.com/uploads/1/3/4/4/134440103/wagukisuvojudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_602d390be4f86.pdfIn PDF document text
    • http://ins.expert/wotojuwipetalanap1bc3h.pdfIn PDF document text
    • https://rotemewan.weebly.com/uploads/1/3/1/3/131380756/vogikunur-tizitumumika-mimukizaduro-bomifitadupagak.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/8ff4b.pdfIn PDF document text
    • http://bred-enligne.com/borlase_6th_form_entryfgs6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5fd1739941347.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/zeworibuzoza/pandora_s_box_arcade_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/lattice_multiplication_worksheets_3_by_3.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_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 5460 bytes
SHA-256: a24dc726f97dc5bed78847aac436736359f58b6acda7e16bf982213c1348fcc0
font_01_sfnt_off0000f666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF666 11192 bytes
SHA-256: 83ce262802b6bed83f766754749dc2b79b03ed0e9098388917d07618a527427e

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