Malicious PDF — malware analysis report

Static analysis result for SHA-256 f977781579ff9d8e…

MALICIOUS

PDF

76.6 KB Created: 2021-03-14 17:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6a2953bf9edf1ff9034d55c3334b1774 SHA-1: c6228d29f9a8e81f6d795f4c868692d22ecca496 SHA-256: f977781579ff9d8ee2db06076a11729f9531bc71b6d6bef5bc0abd84325c878e
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Harry Potter in Spanish free', suggesting a lure to entice users to click on the embedded malicious URLs.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=harry+potter+in+spanish+free PDF link annotation
    • http://kajejib.medianewsonline.com/the_lover_marguerite_duras_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sixajuzap/jihjSa2/wokafakuxidon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcb23c0ccaec.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/IyherkP/kawusananuporugabisevogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414691/normal_600956ad96a67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_60401cc0b5e0d.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/iiijjjT/download_pewdiepie_tuber_simulator_mod_apk_terbaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382189/normal_5ffceff8aa9c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_6027a2fa4e99e.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/bgdjiBh/miwiwusepemidagi.pdfIn PDF document text
    • http://ionatr.fun/kidde_kn-coeg-3_nighthawk_review3cr33.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/QhfK9ig/9002705990.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/ifGgcjf/kofonipuxalapixij.pdfIn PDF document text
    • http://shop50off.info/lagewijixonosibakujurefv0qh.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/hDOib3x/real_racing_3_wiki_upgrade_strategy.pdfIn PDF document text
    • http://mon-compte-cmb.best/guitar_strumming_patterns_bookug4em.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/nagudo/55283731546.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/13837729885.pdfIn PDF document text
    • http://lifobem.myartsonline.com/nikebuzave.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/14009872631.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/cuanto_cuesta_el_metro_lineal_de_barda_de_block.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/esl_present_perfect_and_present_perfect_continuous_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/vunakokaw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 5020 bytes
SHA-256: 01d1f41cf3ed21ea77759e6af2b48365e72e0c3b7c46841f47c89dabcd4e5825
font_01_sfnt_off0000fde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE7 11456 bytes
SHA-256: dccbc7a52872282733cc29e37be3506df86a31c800288bada42afc46123c2e62

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