Malicious PDF — malware analysis report

Static analysis result for SHA-256 199949253a58e6f3…

MALICIOUS

PDF

90.1 KB Created: 2021-03-11 16:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9dd2ddead7e16d9f4857065372a9e4be SHA-1: 5c1f7437fa42dbde9c439d684e1a85f7df2f79ce SHA-256: 199949253a58e6f36ef830eb5a47960fb194e8b98781ff7a64256ee29a1dbfe2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO spamming technique. One of the primary URLs, 'https://soxebez.ru/award?keyword=mec+bncc+educa%25C3%25A7%25C3%25A3o+infantil+2020+pdf', appears to be a lure for educational content, likely to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://soxebez.ru/award?keyword=mec+bncc+educa%25C3%25A7%25C3%25A3o+infantil+2020+pdf PDF link annotation
    • http://robertferrell.net/who_buys_books_near_mehxant.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/juxeminid.pdfIn PDF document text
    • https://pabotori.weebly.com/uploads/1/3/1/0/131070723/1191118.pdfIn PDF document text
    • http://zijezokoriwe.iblogger.org/advanced_java_concepts_with_examples.pdfIn PDF document text
    • http://dreabling.online/9844139345wkcgq.pdfIn PDF document text
    • https://sibanixo.weebly.com/uploads/1/3/1/3/131380297/5991e.pdfIn PDF document text
    • http://buvosidif.22web.org/2020_mustang_configurations.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/tevomenil/blur_song_2_drum_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a52fd9-1353-41aa-bda5-a7ed259eeebb/xuzudigirugudol.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/guess_the_game_answers_casino.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/akta_pure_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816be5a2-7d99-4249-ad69-401833ff206d/non_profit_nonprofit_business_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/jalupevibowizibu.pdfIn PDF document text
    • http://pedijuwugeta.rf.gd/80341817301.pdfIn PDF document text
    • http://fegidil.rf.gd/windows_7_professional_password_reset_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/slovenia_kranjska_gora_snow_report.pdfIn PDF document text
    • http://zagopemolal.rf.gd/sujipuvudenas.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/5837637631.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/court_of_mist_and_fury_book_order.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/50683980275.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/ventajas_del_almacenamiento_en_la_nube.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_off00011e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 5792 bytes
SHA-256: fbeb8d1109674a7fb353a019b062eef22736deda3b1445e68a102f1d8108c255
font_01_sfnt_off0001313e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313E 12936 bytes
SHA-256: f1a4dba4131b71efe8a12997616e1577a671f944103ddfb90d7dbbda2905492b

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