Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fd5530ce83f6cf…

MALICIOUS

PDF

75.9 KB Created: 2021-02-21 14:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4ce0d848787f6c53d52bf90ec01197b9 SHA-1: 74e46efe59e9cd3afb8eabd9de0823a13bb76550 SHA-256: d5fd5530ce83f6cf7ce86debcf58d93a7adf8b33790c7b7b16cacdfa96e41126
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating an external URI pointing to a suspicious domain. The embedded URL suggests a phishing or scam attempt, likely designed to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs are indicative of a malicious document, potentially leveraging JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wb?keyword=reading%20like%20a%20writer%20pdf PDF link annotation
    • https://cdn.sqhk.co/xevowuto/iahhjhF/fimiladilir.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/Serhhhl/recharge_e_dinar_smart.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/hhAjdig/t_mobile_deals_for_existing_sprint_customers.pdfIn PDF document text
    • https://cdn.sqhk.co/negapevu/ierjgBH/pokujotabutawe.pdfIn PDF document text
    • https://cdn.sqhk.co/kelulegawi/ghigehe/jungle_book_wallpaper_hd_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/6kaAeAK/pupedesadurijelanogagir.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/e58eyhg/11330025960.pdfIn PDF document text
    • https://cdn.sqhk.co/japedovak/vhahfhd/gudiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/gibjjJH/xijumabibetosawav.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/iahhcxt/shudder_tv_best_movies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_60297534d370c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_600e829e71ede.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/gomakobez/cara_majaka_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/alliteration_assonance_consonance_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/49098740558.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/47204534882.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_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 5192 bytes
SHA-256: 6c4d277e302de582f4e730dfcf3ce25d6f4859d4508e0158f213844d9b9208b4
font_01_sfnt_off0000fd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD57 11036 bytes
SHA-256: 7c300261a37a02c07fa81e47e8910d88277c321aee1a70c7bb10d6133d4b5004

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