Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbac79510f075f13…

MALICIOUS

PDF

89.2 KB Created: 2021-03-20 19:47:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1e9a747fb2f64f596af6fe2e54ff890c SHA-1: d0003ae6e869fdc6e8ef2ac700d0acf8484ea683 SHA-256: fbac79510f075f13e7457dd0a3cc54b81f36ca1a39d9ae5cb286d59a94483cf8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://yafferge.ru/123?utm_term=binance+api++historical+data'. This suggests the document is designed to lure users to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector and the ClamAV detection point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=binance+api++historical+data In PDF document text
    • https://cdn.sqhk.co/ridijafugemi/fgcI4F0/jinufitoxudama.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/UBhf6NL/60721893673.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/kiwukotodoxire.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/RBqgfia/ranked_voting_maine_senate.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/71j9iir/3d_zombie_shooter_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/fhfggjd/25278870712.pdfIn PDF document text
    • http://dololebajug.scienceontheweb.net/49518783672.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/mMriaPK/carmageddon_2_unlock_all_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/dLHb24E/moses_sumney_rank_and_file_traduzione.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/zinudipir/81847674672.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/travel_expense_report_template._xls.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/congenital_hypothyroidism_european_guidelines.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/night_mother_skyrim_quests.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/21857752910.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/overleaf_table_of_contents_template.pdfIn PDF document text
    • http://kutezowifemiwe.epizy.com/84471772633.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/53259775757.pdfIn PDF document text
    • http://noroved.myartsonline.com/85565518141.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/11323652467.pdfIn PDF document text
    • http://kobomuxowujuvap.epizy.com/61595631373.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/hornpipe_sheet_music_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/empagliflozina_metformina_mexico.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_off00011ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 5212 bytes
SHA-256: ca324e4b82a07e3e28ba7d2297d99dbf20d9f261cbd05dad14233c39784413cc
font_01_sfnt_off00012f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8D 12260 bytes
SHA-256: 35a41b0a4adee5adae58a3934100db8bcf1b7f2cc838de826c80b7be40f178b2

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