Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95bff4049f2dcda…

MALICIOUS

PDF

71.4 KB Created: 2021-03-03 13:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 318cee7574a3f7b364c914626a9038e9 SHA-1: 3c517c05f569136a8687e1b515bc67ad927e8321 SHA-256: f95bff4049f2dcdaa39feb4324abc8fea8e6109d92e6afdd1fae44b9b180b487
284 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://crophysi.ru/award?keyword=challenger+le10+lift+installation+manual In PDF document text
    • http://tegor.xyz/zakotaletigodifekgt3c.pdfIn PDF document text
    • http://kumujobu.iblogger.org/private_practice_cast_season_2_episode_20.pdfIn PDF document text
    • https://nazugawexavidi.weebly.com/uploads/1/3/4/6/134678572/6c1525f.pdfIn PDF document text
    • https://jixisejilikabow.weebly.com/uploads/1/3/4/2/134265892/f2e2cd02ce84.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/mudatudafobenabawofuled.pdfIn PDF document text
    • http://cmb-eco.com/41170536588gzu78.pdfIn PDF document text
    • https://likifovufuli.weebly.com/uploads/1/3/4/5/134588617/dfbe359ab2031.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/tempstar_ac_reviews.pdfIn PDF document text
    • http://allmedbook.com/covid-_19_pandemic_utility_bill_assistancewyvwu.pdfIn PDF document text
    • https://sixixufur.weebly.com/uploads/1/3/2/3/132303163/8709726.pdfIn PDF document text
    • http://begemot.space/272146241141293d.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/fRheNWf/gisuz.pdfIn PDF document text
    • http://loginwithfb.site/87255453376rn815.pdfIn PDF document text
    • https://xonugovelixef.weebly.com/uploads/1/3/0/7/130739086/fopetizepoxilix.pdfIn PDF document text
    • https://kusonanozeko.weebly.com/uploads/1/3/0/7/130775507/lewoxizapudenilinata.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
    • http://jimarol.myartsonline.com/how_to_get_check_engine_light_codes_without_scanner_chevy_silverado.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_off0000ce88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE88 5280 bytes
SHA-256: 186c103beec461b9439e60dea77938b8f64786c8ec3ed93900ba03f7581cae49
font_01_sfnt_off0000e052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE052 9920 bytes
SHA-256: 860dee2a1480dd27d21ed58bb73b79abda6bcccc9ebeacbd589dbdfabfddb410
font_02_sfnt_off00010236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3