Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9edda898e3ef967…

MALICIOUS

PDF

72.7 KB Created: 2021-02-22 06:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 546edf29343de39e58093029c23b8eed SHA-1: d6a6b3fc07cdf1a06df4c34cce3d970f00b3c64d SHA-256: f9edda898e3ef9670da4985ac1349a07e89c4961d870150cb2b29c4472ad992d
116 Risk Score

Malware Insights

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

The PDF contains a malformed stream and an embedded URI pointing to a URL associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://bologen.ru/strik?utm_term=health+and+safety+%2528training+for+employment%2529+regulations+1990+pdf PDF link annotation
    • http://helplnstagram-confirm.com/gangstar_mv_original_copy_apkcayjx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_602ec01bde0c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_6010d2c102338.pdfIn PDF document text
    • http://romeital.space/stanley_45_combination_plane_blades4sq8k.pdfIn PDF document text
    • http://dragonflysagewellness.com/75493420174zmagi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5ff89d4a39dde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_6024b3b0595c6.pdfIn PDF document text
    • http://damomemisogadex.iblogger.org/fojupujowolexe.pdfIn PDF document text
    • http://online-sistem.site/recommendation_letter_template_word_docgzvw1.pdfIn PDF document text
    • http://fumigatoff.online/xarelenibuvessntbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402246/normal_5ffdb932906bf.pdfIn PDF document text
    • http://nuveclovet.xyz/xisoxomabubiwet5xrf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_60332936c71e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_600d674f9472e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485004/normal_6016516604d75.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/netinuwa/pefatigipitixe.pdfIn PDF document text
    • http://tejusadesivuti.epizy.com/gategalasupu.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/scholar_who_walks_the_night_song.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/tabela_acgih_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/89611656448.pdfIn PDF document text
    • http://serobamemesazan.rf.gd/dymo_labelwriter_450_twin_turbo_not_printing_windows_10.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/definicion_primeros_auxilios_oms.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_off0000da6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6B 6024 bytes
SHA-256: b0364494594aab9415de2c7ef5e0666115670c2301f094b53bd87b3febd1a453
font_01_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 11216 bytes
SHA-256: 5edb2e233fe4a325a2f27089669737f04282d4e26bc22d58f9b2e00207f5720b

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