Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8938ce3c38d606…

MALICIOUS

PDF

72.4 KB Created: 2021-01-27 16:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 840968b5457356dafd569d577a2f6edc SHA-1: ba216e238ac367df72c1f46d68215d592ef99cf5 SHA-256: bc8938ce3c38d606d72e00d94d96554bf9f5c2c77dcc8817ce05e92cd4d93356
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wb?keyword=v%20moda%20crossfade%202%20earpads In PDF document text
    • https://cdn.sqhk.co/dijogiper/hKjdgea/dejajesisono.pdfIn PDF document text
    • http://idealica-ufficiale.site/poxoxowuviteguribepots5tau.pdfIn PDF document text
    • http://zefunafujazi.22web.org/mesofit.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/bMhfiiV/41428668529.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/NrTgePz/java_adventure_game_jar.pdfIn PDF document text
    • http://hugertely.xyz/27284779123rgbmb.pdfIn PDF document text
    • https://cdn.sqhk.co/rezejigobip/hbgdhe2/80267805606.pdfIn PDF document text
    • http://helplnstagramoffice.com/vubovudetaxedexinuneku2cig8.pdfIn PDF document text
    • http://takipleskazan.org/97896590839omw9h.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/ggwhajc/drive_unlimited_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391915/normal_5fc6dfeaaea16.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/brain_over_tricky_puzzles_level_2038469.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_5fff477619ddc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dubabin.rf.gd/lien_waiver_construction_template.pdfIn PDF document text
    • http://zasewosena.rf.gd/4711810675.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_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 5364 bytes
SHA-256: 4d47a075ff1afde64d8e6f5c72c14db93a944498f22338f70202d8671e9c0227
font_01_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 10968 bytes
SHA-256: 4264f13171c339e38370e3247d20fd65bfbf37517982a72bff94234c435ae92b