Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3bf424bbaa1ec1…

MALICIOUS

PDF

69.0 KB Created: 2020-12-23 14:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a3b8d456ba7fb7e163edc615d647afbc SHA-1: 2441649c6821d2a5b6e75480e52520153d9f3372 SHA-256: ea3bf424bbaa1ec1f5144fe8e24e9b6144af637db92c192b85abccbf8b704839
156 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, suggesting a link farm or redirection scheme. One of the embedded URIs, 'https://trafftec.ru/aws?utm_term=shareef+badmash+song', is suspicious and likely leads to a malicious site. The PDF structure and the presence of numerous links indicate an attempt to direct users to potentially harmful content, aligning with phishing or malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/aws?utm_term=shareef+badmash+song PDF link annotation
    • https://nuwuzeparagagux.weebly.com/uploads/1/3/4/8/134883197/52b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f8770108e2a8.pdfIn PDF document text
    • https://juzugimigiroteg.weebly.com/uploads/1/3/2/3/132302883/gexeligaz.pdfIn PDF document text
    • https://gazetitorujij.weebly.com/uploads/1/3/4/5/134599815/1740823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495058/normal_5fb2d74549dc0.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/fuwuzerijofa/buell_1125r_workshop_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/64790548512.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/nazipodarirubaguwuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/javascript_form_multiple_submit_button_value.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/maslow_self_actualisation_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/black_santa_emoji_merchandise.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/21106833983.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/54892082060.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/sheet_music_foggy_mountain_breakdown.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/50550376952.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/after_effects_video_tutorials_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/lagu_back_at_one_cover_acoustic.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/kisanilabekabepepodis.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/linux_commands_with_examples_free.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_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 5532 bytes
SHA-256: 9299c32d0d23f0807b6006f2dc0f25a776473d5235945d6baf953f5509bfb031
font_01_sfnt_off0000e37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37F 10616 bytes
SHA-256: 80697c41b88c578d25c7961d8740c461b999fee7895b73dc98dc18e8d8346a7e

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