Malicious PDF — malware analysis report

Static analysis result for SHA-256 41eba254767d284b…

MALICIOUS

PDF

88.7 KB Created: 2021-03-10 08:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 54927e0ce5f4e04baeb243db03aaa975 SHA-1: 96ccaef908fd6bac76d8cca25ee3f5d63c829ab6 SHA-256: 41eba254767d284be2e3ed2daf5125bec00ba4161f9100612b95890c1c9a673e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, a technique commonly used for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' specifically points to the generation of many external links, suggesting a campaign to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://bologen.ru/award?keyword=briquette+making+pdf PDF link annotation
    • https://zoxexakaxikat.weebly.com/uploads/1/3/0/7/130739387/80f459f8fa9.pdfIn PDF document text
    • https://xemegejimeje.weebly.com/uploads/1/3/1/6/131636808/duvupiveliz.pdfIn PDF document text
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/c07bd2d68.pdfIn PDF document text
    • https://zirodamabesad.weebly.com/uploads/1/3/0/7/130740068/3167297.pdfIn PDF document text
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/somaxexibusow.pdfIn PDF document text
    • https://viwoxewadekam.weebly.com/uploads/1/3/4/0/134016770/kikaduvafali.pdfIn PDF document text
    • https://zoredufuno.weebly.com/uploads/1/3/4/6/134638801/e1c0b52e.pdfIn PDF document text
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/romosivenokenot_vasapimadezabi_filaju.pdfIn PDF document text
    • https://bezubimuxidisa.weebly.com/uploads/1/3/1/4/131453869/8327681.pdfIn PDF document text
    • https://takazajabu.weebly.com/uploads/1/3/4/6/134610177/67e7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_026089023f7c4cc39c7ce7b05a95195a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/32793752366.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/what_does_wuthering_heights_represent.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_924b4f3da3534e9e999a1553b022795b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/how_to_automatically_multiply_two_columns_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/oracle_ap_expense_report_template_table.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/what_are_the_types_of_film_genres.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/46058435292.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/98027056503.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/best_fb_auto_liker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/25727024335.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/angry_birds_cartoon_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/what_are_the_four_themes_that_have_guided_early_childhood_education.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_d347c38568b54f9b9bc4b9b063978cc7.pdf?index=trueIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_f1729af3504242ac8cbd038c1f2d6c0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/46453295195.pdfIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_d6c76f752633424fb643971c755a44f5.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 5388 bytes
SHA-256: 423e5c8c75376b4dcf8d06ddbdc590930281b32ac2d5bfde000f5cbe0849c93d
font_01_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 10628 bytes
SHA-256: dc29236f7b550921b88c275f53ec4b822223c7e3a2691da54ac08af351f9cab4
font_02_sfnt_off00013ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DED 16684 bytes
SHA-256: cc86994599ca2b6bade3ef2a24080e5ca7d0105f80c2e61a4a6d43fb5994c661