Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f40b2086bdd3579…

MALICIOUS

PDF

70.0 KB Created: 2021-02-22 19:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 052847f7646e6fb8753857e48d51c214 SHA-1: 945032ee78d794998050f797053f83a71285eb80 SHA-256: 4f40b2086bdd357935af021d6b0a95321fff56eaa135a26513dd218281fae526
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/wix?keyword=need+for+speed+hot+pursuit+apk+free PDF link annotation
    • http://polanuredun.iblogger.org/pinomuwifikovivagozini.pdfIn PDF document text
    • https://zulezinema.weebly.com/uploads/1/3/0/7/130776370/ledere-wavib-vuvixanijolo-kunutaba.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/eb57c8685c1.pdfIn PDF document text
    • https://xudutufatixoli.weebly.com/uploads/1/3/5/9/135957433/2878021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_600e7744321be.pdfIn PDF document text
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/7051456.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/hiBAjdy/math_kids_add_subtract_count_and_learn.pdfIn PDF document text
    • https://zipixaxunisegon.weebly.com/uploads/1/3/4/6/134625234/kukidavove_guwifezotak_xokexaxage_vivukawojawape.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/T32VgBU/kesukesukunidabutuzume.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/ghghgDX/98462167868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://javasuk.epizy.com/dream_girl_film_mp4.pdfIn PDF document text
    • http://nanefelizili.epizy.com/39541986216.pdfIn PDF document text
    • http://rawotagetanona.rf.gd/how_play_cards_against_humanity_online.pdfIn PDF document text
    • http://fibogexexagiram.rf.gd/duxufowajagidomowozez.pdfIn PDF document text
    • http://tavejetenugaku.epizy.com/4209592974.pdfIn PDF document text
    • http://vijuzoluza.epizy.com/firewall_cisco_asa_5510_datasheet.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_off0000d07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07D 5132 bytes
SHA-256: 362703f2f98a7236d7b5a6d3c2081aa3fa494932c06ef57e1a2af169960dfbbe
font_01_sfnt_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 15028 bytes
SHA-256: c331ba236cca3ecddc923eef822cfd1dd0c0a4c66aaaf3dffd79682fcf3a4bda