Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b6e9f9d8786ae8…

MALICIOUS

PDF

68.7 KB Created: 2021-02-19 18:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6e46dccd8990f0f1bd71a226f8fbf021 SHA-1: 81302014a00c2ba5ddb66e294eb741e1fd4015e1 SHA-256: 16b6e9f9d8786ae86ba0ed29443ff594625d2af6e956b8929078654808315790
96 Risk Score

Malware Insights

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

The sample is a malicious PDF detected by ClamAV and an ML classifier, containing an embedded URI that points to a suspicious domain. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a malicious site or download further payloads. No scripts were extracted, but the PDF structure itself likely facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=qualitative+research+%2526+evaluation+methods+%25283rd+ed.%2529 PDF link annotation
    • https://cdn.sqhk.co/rivogigaweb/0iaieyY/shelter_insurance_company_columbia_mo.pdfIn PDF document text
    • https://mizijuwewis.weebly.com/uploads/1/3/4/3/134392366/64eb3267.pdfIn PDF document text
    • http://mutuvukawawe.22web.org/19912775712.pdfIn PDF document text
    • http://mgacessoria.online/dysrhythmias_nclex_questionsylz5l.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/Xhhihjb/94836600683.pdfIn PDF document text
    • https://rosolivemimej.weebly.com/uploads/1/3/1/3/131382018/kidigokiviroxevofox.pdfIn PDF document text
    • https://bevarari.weebly.com/uploads/1/3/0/7/130740456/9338332.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/hiIgdhh/crowd_cow_reviews_yelp.pdfIn PDF document text
    • http://therarbooks.com/rufefexuk6hkw.pdfIn PDF document text
    • http://azules.ru/vokulukulegibezmfb44.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/jodabiladezot/90934938724.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/tesatemadiluzomenuzunejuw.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/94813719790.pdfIn PDF document text
    • http://wamulax.epizy.com/picsart_photo_editor_apk_full.pdfIn PDF document text
    • http://xesufiwonelu.epizy.com/kijunid.pdfIn PDF document text
    • http://bixikaw.epizy.com/60846704234.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/lipid_guidelines_australia_pbs.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/angels_and_airwaves_songs.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_off0000cc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1E 5008 bytes
SHA-256: 18f5f507f054a4088558714ea0b2a2757a288175f07e3fd8ffd65d3224c8f424
font_01_sfnt_off0000dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD24 12680 bytes
SHA-256: 4972bc5b6081f2d6442e10c27c79e911e61b9169a082ee6c7f70e0ab4a2c0fdb

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