Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec0a718a9658d24…

MALICIOUS

PDF

81.2 KB Created: 2021-04-01 00:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 91e1ea760d585a1bc7f6a293d6f63e0d SHA-1: ca74ed8181a63f25cb567985274d7aa0bd6617fb SHA-256: fec0a718a9658d24c29d48ed519d61d8da3c896523d4a8b2966635ba49347092
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with the primary URL suggesting a lure related to a book search. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, pointing towards a malicious intent to drive traffic to potentially harmful sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=carry+on+rainbow+rowell+pdf PDF link annotation
    • https://zakutawevuvukug.weebly.com/uploads/1/3/5/9/135970657/wemidekiku-tabot-visukimodadorer.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/Kzqcje2/kinemaster_video_editor_video_maker_app.pdfIn PDF document text
    • https://piguvedulo.weebly.com/uploads/1/3/4/7/134724556/mogeruxunaxenokid.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/increase_brain_power_books.pdfIn PDF document text
    • https://cdn.sqhk.co/larovejadeb/zTjhvbq/does_verizon_cloud_save_text_messages.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/gMRghii/51991716789.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/hhCjwje/jotojodujulolejatiwakub.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/tavodugixadokufaxanixaput.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/examen_atomistique_corrig_s1_svt.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/2jfhitr/882067782.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/tobito/medodokovosonugazeledo.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/gumball_and_dungeon_boss_guide.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/los_anormales_michel_foucault_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/wovubaxitilurone.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/labijufirugaxesasanijefi.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/bizebofubegokebagugev.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/pejigux.pdfIn PDF document text
    • http://redifigikutusoj.myartsonline.com/42591889463.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/witchery_necromancy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/suse_linux_hardening_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 4924 bytes
SHA-256: f4a90683e0097f7e788cf05ff4968d4dd583f1ca5d8c777e46b7fc18f8de53c4
font_01_sfnt_off00010388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 10776 bytes
SHA-256: 39eeb043402dda40137f3072b4a3c5f94ca321d88b71aa9d046521e6fe5dbe1a
font_02_sfnt_off00012810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12810 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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