Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2cc2d5bf59e85b…

MALICIOUS

PDF

79.7 KB Created: 2021-03-31 07:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3900c57646c6be391fe5730a9c012008 SHA-1: cfc7069db6ef276a18b63e5729bd3086c24f90dd SHA-256: de2cc2d5bf59e85b329b8c016646f6ed45da4b076a21a6835fef6fb331061698
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-severity 'PDF_SEO_UTM_REDIRECTOR_LINK' rule indicating an image lure for phishing or a free download scam. The embedded URL 'https://zajinet.ru/award?keyword=bhavabhuti+books+pdf' is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://zajinet.ru/award?keyword=bhavabhuti+books+pdf PDF link annotation
    • http://gexopidikimo.mygamesonline.org/calentadores_solares_funcionamiento.pdfIn PDF document text
    • https://cdn.sqhk.co/badiwugaleko/hgHEX1b/bosch_mixer_amplifier_datasheet.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/ar_15_ammo_loader.pdfIn PDF document text
    • http://gatigade.iblogger.org/ap_biology_osmosis_and_diffusion_lab_answers.pdfIn PDF document text
    • http://buzajusefuzasi.22web.org/52611495183.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/jdihzie/bawavesufugo.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/fhdjeij/83091525808.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/teximikamukubo/ancient_greece_artifacts_for_sale.pdfIn PDF document text
    • http://benepiro.rf.gd/brawl_stars_supercell_apk.pdfIn PDF document text
    • http://vonanovab.epizy.com/500_adjetivos_mais_usados_em_ingles.pdfIn PDF document text
    • http://kimatun.epizy.com/35774096599.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/malilaxajajuwojisifo.pdfIn PDF document text
    • http://zixedofa.epizy.com/binomial_theorem_notes_for_iit_jee.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/what_is_the_order_of_alex_cross_books.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/13775383730.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/3325013829.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/75188614363.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/gepapekupuxavajari.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
    • 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_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 5312 bytes
SHA-256: ceda6fa5bf26a82c522675fb90387306cd9b8d8f3751234d4f32a2ceba4dcec9
font_01_sfnt_off0000f707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 10936 bytes
SHA-256: 0b8d24fa7d045323c542773c1d6eef850e05320515f47a3ae2536e65aefdec47
font_02_sfnt_off00011c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C91 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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