Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5aba0a8ffcc5fa…

MALICIOUS

PDF

75.0 KB Created: 2021-04-12 20:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cefb0811d469528a438cc909120cddc5 SHA-1: df059930d715ff165670267723e4f35418a900d9 SHA-256: df5aba0a8ffcc5fa68b7d9bb2940f90b90a73406bee0320d8b6a1ca648246204
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://pelibifir.ru/strik?utm_term=how+to+fix+air+conditioning+unit+house, is the primary indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=how+to+fix+air+conditioning+unit+house PDF link annotation
    • https://cdn.sqhk.co/falugojafat/hgpWwhh/65974329847.pdfIn PDF document text
    • http://molalozigiwev.iblogger.org/45235514863.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/O4jbgf9/subuzafutuxisovo.pdfIn PDF document text
    • http://getbuiss.online/57395342003ame8y.pdfIn PDF document text
    • http://rixerudawane.iblogger.org/dusuzemovajilar.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/cQvlYXi/28046982942.pdfIn PDF document text
    • http://potenciy.xyz/45119491523arud8.pdfIn PDF document text
    • http://resimpub.com/active_listening_techniques_paraphrasing5jr9j.pdfIn PDF document text
    • http://bachanalytics.com/ssc_challan_form_download_201936c7k.pdfIn PDF document text
    • https://cdn.sqhk.co/zixajofazadi/bOgfCII/25951525754.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipemilidibimu.rf.gd/when_did_john_owen_wrote_the_mortification_of_sin.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/lekegafu.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/86258742053.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_f866ba8acbca47cab1323231d9de8b89.pdf?index=trueIn PDF document text
    • https://8607b5f8-c2b2-49b7-a314-b17bd4efff40.filesusr.com/ugd/d99252_84551d92f7d0450f8b35bf5f64e3c485.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/gaxaz.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_882aef6143b44451ac65025627708ea5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/30057597020.pdfIn PDF document text
    • http://zigimavabixexib.epizy.com/medical_words_that_start_with_semi.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/android_9_samsung_split_screen.pdfIn PDF document text
    • https://24976a62-ea59-4ca6-8500-d0bd08f9a094.filesusr.com/ugd/65a075_7ed7411544a14b15a513826908daa2a8.pdf?index=trueIn PDF document text
    • http://rajiwewovipu.epizy.com/50028083221.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_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 5372 bytes
SHA-256: b1707ee578a0563445bd96cc6a99d3063a4bb458bb50512010524cd487cb2273
font_01_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 10732 bytes
SHA-256: 5ba3c491390c29b110fba42125a14b151208f2276f435687a26c8dfdc36e2655

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