Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d41191ae0e4ac6…

MALICIOUS

PDF

95.4 KB Created: 2021-04-03 03:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 01b183c56e0675480396dde094419566 SHA-1: c6c5dd24996c8f5216fadcf505d2f1a4803a9f34 SHA-256: 14d41191ae0e4ac6d5f0a91244d10dd33b38ae2fdb7238c2d72813979f5c74a0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are part of a link farm designed to redirect users to potentially malicious websites, as evidenced by the PDF_SEO_LINK_FARM heuristic. The primary lure appears to be related to 'deficiencia de vitamina d en adultos pdf', directing users to a suspicious domain.

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://leonvi.ru/award?keyword=deficiencia+de+vitamina+d+en+adultos+pdf PDF link annotation
    • https://jeputuzomum.weebly.com/uploads/1/3/1/3/131398597/224e067b005769d.pdfIn PDF document text
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/kibukibi.pdfIn PDF document text
    • http://milanbeachs.space/what_do_i_need_to_renew_my_license_ms5hnd8.pdfIn PDF document text
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/d8f8537.pdfIn PDF document text
    • http://cenderaoriginator.com/jasuriluvegevexozurehuxqh.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/behind_closed_doors_song_lyrics.pdfIn PDF document text
    • http://semengergel.ru/lopuxedegadozekimitevubstvxg.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/who_are_famous_magicians.pdfIn PDF document text
    • https://cdn.sqhk.co/sarimotel/3S2iYd6/30375083590.pdfIn PDF document text
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/xaziferunesot-zanipekupabovuf-fedusizez.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/4145980.pdfIn PDF document text
    • http://bilkan.fun/difference_between_eluviation_and_illuviation0sff3.pdfIn PDF document text
    • https://soxiwavarado.weebly.com/uploads/1/3/1/4/131437421/9738782.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/djeejb6/spectrobes_ds_emulator.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/kivomeg.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/zafirawit/calendario_2019_bolivia_feriados.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/decision_making_skills_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/jutozijufidekekabon.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/wefijeka.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/35415534954.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
    • https://medlineplus.gov/spanish/vitaminddeficiency.htmlIn 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_off00011e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 5264 bytes
SHA-256: cca2c6f119125aa610434a81ed44e4285cbad38da186f8df36b9b5ecffa990fb
font_01_sfnt_off00013077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13077 12504 bytes
SHA-256: 1129a6390ac13768a1dc103f90659bdc3586bd029e98d2ab438783e5f36d0912
font_02_sfnt_off000158e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E5 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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