Malicious PDF — malware analysis report

Static analysis result for SHA-256 0890079094c6f918…

MALICIOUS

PDF

76.0 KB Created: 2021-03-24 20:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 30f2d6964f4fcb08e4cca2e6a5f9a49a SHA-1: 7069bdf6f50f798b8149ae7b4cec5b5f8ce6c800 SHA-256: 0890079094c6f918cf062e8afa2669239a1e725c24a1fcf35142e36e9e4951d5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to drive traffic to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/award?keyword=az+203+syllabus+pdf PDF link annotation
    • https://cdn.sqhk.co/wufevinek/hafgfGP/drive_in_idle_tapper_game_hack.pdfIn PDF document text
    • https://fugejifok.weebly.com/uploads/1/3/4/1/134132056/772987.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/i67Ties/sumozefifewozu.pdfIn PDF document text
    • https://cdn.sqhk.co/wulozonixuf/jghiCoj/85803117444.pdfIn PDF document text
    • https://cdn.sqhk.co/fifusaji/igjb2Q6/winking_owl_wine_nutrition.pdfIn PDF document text
    • http://form-copyrightservices.com/direct_speech_worksheets_for_grade_78sh12.pdfIn PDF document text
    • https://cdn.sqhk.co/puwokiraf/bFigDhj/fusionner_page.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/fJhgQgg/newscapepro_minecraft_skin.pdfIn PDF document text
    • http://zootime.store/sc_dmv_driving_test_in_spanishjj9su.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/1785424.pdfIn PDF document text
    • http://italywow.info/table_of_plenty_song_lyricsdik7j.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/zgdhjp4/23245546318.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/6ohgdD8/tap_smiths_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/ihaWjao/bafojifati.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/povodijirig/rutofasopisixusu.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/bangladesh_taka_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/family_tree_exercise_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/what_is_the_best_weather_station_to_use.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/84185259561.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_off0000ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 5660 bytes
SHA-256: 51c74d78a441193b91a552ba8067385ce7a9afed020dc83bad5970ec1e81e89a
font_01_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 10392 bytes
SHA-256: 0a2bfec48f8478ebb7bf17bf6f373ea1ffd5b7d17684e1830324b94a432706f6

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