Malicious PDF — malware analysis report

Static analysis result for SHA-256 75317e064e72b0ca…

MALICIOUS

PDF

122.2 KB Created: 2021-05-09 22:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4540252722d70930978084bcbf803397 SHA-1: 39ba4ac357bf7e8778af47b897a2937f1cc198d2 SHA-256: 75317e064e72b0ca91265a0170e95258a8988cac4e0a79d482382f327422fa2e
104 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'vilenefex.ru' and multiple other suspicious URLs suggests the document is designed to redirect users to malicious content or download further payloads. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the phishing or social engineering aspect of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/strik?utm_term=propresenter+mac+big+sur PDF link annotation
    • https://xugojegisonixen.weebly.com/uploads/1/3/4/6/134684264/270008.pdfIn PDF document text
    • https://sovokuragul.weebly.com/uploads/1/3/2/8/132814371/puvasarewirax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_602ce0f1db267.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/livro_administrao_de_marketing_12_edio.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/boludonupa.pdfIn PDF document text
    • https://fupesatufijipaf.weebly.com/uploads/1/3/2/7/132740914/nojoxikakewefi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5fecefa442857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417045/normal_6008c5b7d74d2.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/wowodidesa_rakiz_navebuvuvusupi.pdfIn PDF document text
    • https://xemubafuwifo.weebly.com/uploads/1/3/4/4/134475424/941bbcccfc.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/zemunomipazikez/how_to_work_bosch_silence_plus_dishwasher.pdfIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/vespa_px_125_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/what_are_site_reliability_engineer_comfortable_with.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/sonanukagufifofal.pdfIn PDF document text
    • http://dotopaku.atwebpages.com/up_board_result_2020_class_12_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97db7bcb-92a5-4830-a068-cc69fd2a93dd/1145532371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ab80de-1425-4928-84bf-9121b36524f0/cake_bible_carrot_cake_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/36646736334.pdfIn PDF document text
    • http://kipazafar.atwebpages.com/cerere_card_european_de_sanatate_2020.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001b391.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B391 22552 bytes
SHA-256: ac706bede023d52e7a25aa1e4841df8c5ce164ccd14cede153ec6347e4de6354
font_00_sfnt_off00016b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B0B 5364 bytes
SHA-256: fb1ba9342edc62da7fe8f5ea64cf3ea535be05d9baa76df3f133c56043efcc3c
font_01_sfnt_off00017d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D2D 17936 bytes
SHA-256: 7ce0307da3f0bad2e321405072c89062db77fd316e17b60b0e32603995e973c0

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