Malicious PDF — malware analysis report

Static analysis result for SHA-256 26094a1da9025154…

MALICIOUS

PDF

73.4 KB Created: 2021-03-30 22:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 53a83495acc9c57d54bc37b7a30846a1 SHA-1: e791fb7926e3d32c7901271a7d4d2fb0c8c7ffea SHA-256: 26094a1da9025154b6bc86c2b4dddfb44ca9e25bc44f1a49b064ab62143256cb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URLs, 'https://ponafet.ru/award?keyword=briquettes+business+plan+pdf', is directly associated with the document's content, suggesting a phishing or malicious redirection attempt. The presence of embedded URLs and the ML classifier's high confidence score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://ponafet.ru/award?keyword=briquettes+business+plan+pdf PDF link annotation
    • https://cdn.sqhk.co/jizuxadif/jhUDC59/best_vault_app_for_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/ifiijic/69189072397.pdfIn PDF document text
    • https://zipesonavizi.weebly.com/uploads/1/3/6/0/136052153/5df71.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/E9Seibf/wenavezudufifi.pdfIn PDF document text
    • https://viwifigejemi.weebly.com/uploads/1/3/0/8/130814408/pupujavu_mupotipexud_faruvijofed.pdfIn PDF document text
    • https://rogixatig.weebly.com/uploads/1/3/5/3/135323026/3294d14db.pdfIn PDF document text
    • https://dawosovakix.weebly.com/uploads/1/3/6/0/136097295/kawizoxategogoz.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/hjjdZgd/zombie_defence_tycoon_codes_wiki.pdfIn PDF document text
    • https://solawelosadi.weebly.com/uploads/1/3/1/8/131857655/3714092.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/jotizifime/67170870327.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/21890185860.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/fupigujarokufuvojuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/uppsc_result_2018_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/fraction_decimal_percent_chart_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/the_crown_cast_season_3.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/ibt_computer_capsule.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/how_to_use_elgato_capture_card_with_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/xosetupore.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/favexonu.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/faxuga.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/60080880553.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_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 5348 bytes
SHA-256: 49bfcf8afae63e11e579290f2e973922500b2f008a43909c1d8c2c1d3b1b8341
font_01_sfnt_off0000f28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28A 11072 bytes
SHA-256: 3a7ed0d695e1e7f9d2e76ce2d6e8c9c12d515fd55718c5e61130c5a1c73b7abe

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