Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c69b7be6777834f…

MALICIOUS

PDF

72.8 KB Created: 2021-03-21 04:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c1fb761ab9e2540c4c626f0098c613c0 SHA-1: 22df71743b4ef66ee13a3e63687ae03c33177365 SHA-256: 5c69b7be6777834f04a06d5498f069cc5fa1fc77fe91cd4445931cf111ef137f
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_MFA_LURE' strongly suggests the document is designed to harvest credentials by mimicking a multi-factor authentication or one-time code prompt. Numerous external URLs are embedded, many pointing to disposable domains, which are characteristic of phishing and credential harvesting operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://leonvi.ru/wix?keyword=schubert+impromptu+op.+90+no.+2+horowitz PDF link annotation
    • http://towufato.mywebcommunity.org/vertical_analysis_of_balance_sheet.pdfIn PDF document text
    • http://gutprod.xyz/configuring_active_directory_certificate_servicesv06ni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_6040313ec40ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_6028e6c531bb3.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/batugawixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410695/normal_6050f28195459.pdfIn PDF document text
    • http://hidver.com/xukaku2bhg8.pdfIn PDF document text
    • http://xuritepizib.mygamesonline.org/delta_airlines_boarding_pass.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_603965c4c11d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5fe22c8d7b5fc.pdfIn PDF document text
    • http://chtotakoebezuz.biz/kyocera_ecosys_m2035dn_printer_drivers8opl6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490365/normal_604af77ad266b.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/70622429890.pdfIn PDF document text
    • http://pazolozul.mypressonline.com/anabolisme_des_glucides.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/benedetto_croce_livros.pdfIn PDF document text
    • http://situvupumu.medianewsonline.com/88756720198.pdfIn PDF document text
    • http://itverys.space/bisotazudepodijdp53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_6050626ff2d71.pdfIn PDF document text
    • http://talemine.getenjoyment.net/english_grammar_and_composition_class_8_solutions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_60550b3f256ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surotatifezuxe.rf.gd/winters_bone_cast.pdfIn PDF document text
    • http://vagilamiporaw.epizy.com/19446357601.pdfIn PDF document text
    • http://mafokesa.onlinewebshop.net/amina_al_mufti_book_somali.pdfIn PDF document text
    • http://salajire.onlinewebshop.net/fozavoxewinosujoroxideda.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_off0000ddca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 5600 bytes
SHA-256: ea89c2b41384534bfcba2db445f38681b90aa3177b7d7b6365796bb834899df4
font_01_sfnt_off0000f0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CE 10968 bytes
SHA-256: 2a066650aa4d661134c241f75659c87f8b5b791d79e00b93374be23098e930ef

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