Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd64bb6eebe7fcb7…

MALICIOUS

PDF

73.8 KB Created: 2021-03-03 14:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: dce2bc8c2f0484dd91348b560c4c0184 SHA-1: 0f91d0ae38b806adeb812e9ba66cdc921ac0b962 SHA-256: cd64bb6eebe7fcb7213fed7378b6a40c89780e1e59978d9571dd2bd1088b068a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or scam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable domains, further supporting a malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://soxebez.ru/strik?utm_term=what+is+financial+literacy+week PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468572/normal_602270a450705.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/wuvaganatob.pdfIn PDF document text
    • https://kegalanomer.weebly.com/uploads/1/3/1/8/131856310/wiveku_wakadaf.pdfIn PDF document text
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/1431436.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/logitech_z_5500_subwoofer_replacement.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455396/normal_603e83db349ff.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/fibVhjF/37135307905.pdfIn PDF document text
    • https://cdn.sqhk.co/nexuliwadi/Ubgckhh/bazuzira.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475571/normal_5feb099ad591c.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/how_to_read_sw_serial_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/wadumebe/HtzBgca/dasoperekekub.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/duvulabesovis-tililawapet-noveven-xirusejidam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pegozegi/sheet_music_waltz_in_a_minor_chopin.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/comtax_uk_trip_sheet.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/48171217831.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/airtv_player_manual.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_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 5240 bytes
SHA-256: 8e5cc7e69f65332c129ce9def4a28f197219a0ed452a87744557606470cba3a1
font_01_sfnt_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 10700 bytes
SHA-256: bcb14ae95e2804e8fe46ae2ed3e30271ca7965aed4e261ed3b4756842db9cf5c

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