Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a86f566c398178…

MALICIOUS

PDF

75.0 KB Created: 2021-02-21 15:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d7d6b2921a10ec02fef85f840d0ba315 SHA-1: 7577371104d7edd875e42ff5c37b062e4635b7bb SHA-256: 96a86f566c39817806bf24e9d0459c6cae71f0532e144cbc6a6621a7db23f7d2
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The file likely serves as a lure to a phishing site, impersonating Chase bank to steal user credentials.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://letateworu.weebly.com/uploads/1/3/4/3/134365764/japutamofinuwud-kapawaz.pdf.
  • 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/123?utm_term=what+does+tessie+represent+in+the+lottery PDF link annotation
    • https://cdn.sqhk.co/zirimikuj/wijUYii/49548528809.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/3DvEijI/mejamisafefep.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/k49khjf/bombshell_cast_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/FibjilT/pifix.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/japutamofinuwud-kapawaz.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/a1YCxje/35618538202.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/gg8Clha/37060549629.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/jshjRLk/hashtag_for_tiktok_likes_and_followers.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/FiheVgi/granny_mod_ios_nullzerep.pdfIn PDF document text
    • https://cdn.sqhk.co/dasotipamu/FxSjfgw/chocolate_bar_recipe_coconut_oil.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/dgd5qYF/nikutobipejumokizir.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/chQyQM8/poxejuraloni.pdfIn PDF document text
    • https://kujadivenudeku.weebly.com/uploads/1/3/5/3/135324903/1057878.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/bidemewufa/filmy_bollywood_free.pdfIn PDF document text
    • http://bubejukajogimis.epizy.com/mevavijinafatopetubepej.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_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 5164 bytes
SHA-256: 447797a0440b6c56869130743112ac9547beb92a6711bb9080ad6f8d61952996
font_01_sfnt_off0000fb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB74 10276 bytes
SHA-256: 8488d01af17fb6ba94360f6a0125f3b4752d6c6bcff481aec943cf6aefd50b36

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