Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d384e07d52359e…

MALICIOUS

PDF

76.5 KB Created: 2021-02-15 08:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4d93b1dfc7e071c59f69bede1158c3a6 SHA-1: 63bbe6008d01aad86d164513cc6ff9a193ae6c4e SHA-256: 99d384e07d52359e9b19a9b4d30a4649be5c5a5b0afc45a409db1e9544c5bb5e
154 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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/aws?utm_term=aplikasi+adobe+audition+1.+5+for+pc PDF link annotation
    • http://nuverlites.online/minecraft_hide_and_seek_appcvifk.pdfIn PDF document text
    • https://topifovav.weebly.com/uploads/1/3/4/5/134595147/3353569.pdfIn PDF document text
    • http://perfectiona.online/rurikawumogiminakab74hy2.pdfIn PDF document text
    • http://nncucuucuc.space/83563762394qeg47.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/roxusijewjirnw.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/hdljd8f/sign_off_gmail_account_in_iphone.pdfIn PDF document text
    • https://lepefolavexar.weebly.com/uploads/1/3/0/8/130874674/7617837.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/yLpjija/bunny_book_mona_awad.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/iuvigje/amazing_facts_sabbath_school_lesson_6.pdfIn PDF document text
    • http://winoorama.site/98317590898ac181.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/67e7cd274.pdfIn PDF document text
    • http://strita.space/taylormade_golf_m2_manuala0ivm.pdfIn PDF document text
    • https://maladekokox.weebly.com/uploads/1/3/4/7/134745457/sosulawokiz_wivoligevumuwil.pdfIn PDF document text
    • http://quickstore.pro/92847891858vbstb.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/Kgdkgea/puvupasodev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FB 5548 bytes
SHA-256: 78de092026b886849d16ab0b25cdba10b511aa5492c8db6d0e6f25eff5be478f
font_01_sfnt_off0000f9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 12788 bytes
SHA-256: 005acc0b0166047de939c8ee769a04b81995c2f98e5308b4f309751fa24b40ad