Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d45ffc993f4df0f…

MALICIOUS

PDF

71.5 KB Created: 2021-02-21 11:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 25e825c279254664d944d502692c9808 SHA-1: 7677052bb7eb5ee1ae5e19ff0315f0f8ae4317b2 SHA-256: 8d45ffc993f4df0f8f8d3c0373b57101f497640167564ad600a50948b3fc1370
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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
  • 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/wix?keyword=inboxdollars+apk+hack In PDF document text
    • http://vokegitejupud.iblogger.org/4185700980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_6017488f3f71a.pdfIn PDF document text
    • http://yoga-fitness.space/tobiboxexirikiravap40.pdfIn PDF document text
    • http://dietnatur.fun/meme_sound_meme_soundboardxz013.pdfIn PDF document text
    • http://igbusinessabouthelp.com/zomesizuvidiridedet1rj72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369766/normal_5fe4c96d08314.pdfIn PDF document text
    • http://sejapamuji.22web.org/boputisogavon.pdfIn PDF document text
    • http://olymp-trade.top/250696118977is4a.pdfIn PDF document text
    • http://mexicotop.xyz/28950589713duf7k.pdfIn PDF document text
    • http://konsalting.info/comprehensive_agrarian_reform_program_carp_summary648oh.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/14698185395qrz31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wabiredozu.rf.gd/71905781850.pdfIn PDF document text
    • http://tiborumaroxotob.rf.gd/autorretrato_sin_mi_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/free_printable_lesson_plan_template_for_kindergarten.pdfIn PDF document text
    • http://desibevazivoxan.rf.gd/34768246466.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/ikkaraikku_akkarai_pachai_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/how_to_clean_heatdish.pdfIn PDF document text
    • http://zeduneku.rf.gd/52738474635.pdfIn PDF document text
    • http://mivuturirem.rf.gd/75686983390.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/fiwokefaxokesukopu.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_off0000da08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA08 5368 bytes
SHA-256: b43e83470dd27a005c580432734efefaeb6e524c963689d497a43c926e042914
font_01_sfnt_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 10676 bytes
SHA-256: 204140aa7bf85aa0670c87457a74bbe2dc2f2cd14e2993237812b2b45fa71e62