Malicious PDF — malware analysis report

Static analysis result for SHA-256 9917edcb89d73c45…

MALICIOUS

PDF

89.5 KB Created: 2021-03-09 07:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dee3276c03a0adc25428734cbf2d0402 SHA-1: 148aaa4dd7e70502c986c2dd0d45fb732040c7a8 SHA-256: 9917edcb89d73c45e07f4f3eae48eba77bf09395cb9f491fe07372fd6635e5e2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm. The primary URL points to a domain associated with keyword-based SEO, suggesting a tactic to manipulate search engine results or redirect users to potentially malicious content. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing or content-luring campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/award?keyword=html5+pdf+embed PDF link annotation
    • https://dusoveri.weebly.com/uploads/1/3/1/0/131070325/tunajosalavi_rebosuvokizid_wepabutamiraf_jatujes.pdfIn PDF document text
    • https://wajovojov.weebly.com/uploads/1/3/4/6/134652085/87272c039aa3.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/how_does_a_coordinate_covalent_bond_work.pdfIn PDF document text
    • http://reduslim-shop.website/problems_with_black_and_decker_coffee_makerd2xjf.pdfIn PDF document text
    • https://bivunuse.weebly.com/uploads/1/3/5/3/135392281/7490497.pdfIn PDF document text
    • http://gatorama.site/algebra_and_trigonometry_with_analytic_geometry_sladerrxiuh.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/AjhoiKm/94054243987.pdfIn PDF document text
    • http://coloradocustomelectric.com/project_management_bootstrap_templates_free_downloadktofa.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/3682120536861ppv.pdfIn PDF document text
    • https://tunegize.weebly.com/uploads/1/3/4/5/134500295/5f14815.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/ig7jhlB/tezolegite.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/53468593210.pdfIn PDF document text
    • http://rimiripa.mypressonline.com/61663641817.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lorifumofelu/definition_of_international_law_according_to_oppenheim.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/nubefibenabiputazogimow.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/45012844444.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/full_hd_background_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/32582780861.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/request_for_leave_approval_format.pdfIn PDF document text
    • http://vekejuf.atwebpages.com/novation_launchkey_49_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/78927580789.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/klavuu_sheet_mask_review.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10548 2872 bytes
SHA-256: a84fe8ccebaadaec26c68754ff56ec47e75d3d52b13675d8f9989f8d4dc65369
font_01_sfnt_off00010f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F82 4452 bytes
SHA-256: 6c89da306e6b52bf3ebaafe63ab60968990651121f160a998e768398854e1a2b
font_02_sfnt_off00011eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAC 13644 bytes
SHA-256: 42859dae3d5d4d19e0261da67fc1fc7adff0dbb7f79d9ea8cd2367f9566eb100
font_03_sfnt_off00014a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A19 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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