Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8d69b80e6b56cb…

MALICIOUS

PDF

80.0 KB Created: 2021-01-23 02:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f45e1bb63be380dff6008f1f8732db1 SHA-1: d438d7a04efd4a66bdecddda4a311d84576eefd8 SHA-256: ab8d69b80e6b56cb711708ded62c569285f063a3e1d675cb06eaf8fa51ae4141
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=repair%20master%203d%20online%20play%20free In PDF document text
    • https://cdn.sqhk.co/fogobewataja/idRiihj/78830944789.pdfIn PDF document text
    • http://rirelavemug.iblogger.org/60448702281.pdfIn PDF document text
    • https://site-1246781.mozfiles.com/files/1246781/xolufopoziwukupejesigevat.pdfIn PDF document text
    • http://bubuwem.iblogger.org/84210518891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5ff24dc10977a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450251/normal_5feaef7205eb7.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofovam/aNrhi0z/reversi_zero_free_classic_games_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475847/normal_5fd900f2bb321.pdfIn PDF document text
    • http://zirosax.iblogger.org/xupug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gezibetaw.epizy.com/wozimimakofepudiro.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/vajuxuzizudaseren.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/86001177881.pdfIn PDF document text
    • http://jogisav.epizy.com/calligraphy_alphabet_template.pdfIn PDF document text
    • http://bibosisiv.epizy.com/alien_covenant_hd_movie_tamil_dubbed.pdfIn PDF document text
    • http://xugowosapiri.rf.gd/44061103522.pdfIn PDF document text
    • http://nawexox.epizy.com/66797459078.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/contemplates_auf_englisch.pdfIn PDF document text
    • http://napipipazapuka.epizy.com/desafoguta.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_off0000fb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB21 5460 bytes
SHA-256: 41586d7a21b231865b29b0a6ae188d28daad59190990ceb9a1ac5e652454a647
font_01_sfnt_off00010dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAB 11184 bytes
SHA-256: 90182beb2829578309abb561ecc620d8349423bd9910ebdd2f78ee2a71569121

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