Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a8a7e71aafdbdf…

MALICIOUS

PDF

71.1 KB Created: 2020-11-30 17:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dfa977de6209be7dbb4f65dec52d1c6b SHA-1: ebacde9a2b1078214ea60bf3959022c5475525eb SHA-256: 54a8a7e71aafdbdf47d45470024a4b23a6d08ca1d14735c2e7985ca497e5f12d
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a scholarship form. The ML classifier and ClamAV detection strongly support the malicious verdict. While no scripts were explicitly extracted, the PDF structure and embedded URLs point to a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/aws?utm_term=benevolent+fund+punjab+scholarship+form In PDF document text
    • https://penaletaxexek.weebly.com/uploads/1/3/4/8/134886030/374c7e82.pdfIn PDF document text
    • https://davijoxo.weebly.com/uploads/1/3/4/3/134357566/jawiju.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/kokuvirofuwit-bigawamopilifo-melev.pdfIn PDF document text
    • https://velizixevapejaj.weebly.com/uploads/1/3/4/3/134376636/5580427.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ee52d6-047d-41a1-a74e-deb4b28c70a1/28695868820.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0426c7afe470b5574cb6/1606222886549/nickelodeon_logo_history_3.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd4b72f-3e4c-4c94-941c-d7c04b3c3e15/can_you_download_netflix_app_on_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85145bf6-d138-4783-ac24-e5749131f1b6/trozans_sky_shard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb2a3bc-77f2-4c80-9499-2588466797f4/find_the_cat_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/catanzaro_informa_ultime_notizie_cronaca_oggi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555574ca-baac-4f6b-89e8-fed0e66f0767/vuwanukimol.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/epi_info_7_guide_d_utilisation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeef71972c46e3c642a21/1606283008815/17368996935.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd14fab24ece27e9136f2f/1606227194208/google_docs_frozen_2_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA85 5720 bytes
SHA-256: b248a81d5ee0ffce91fff20123b7451b143ac334b7e349e90b6ba49dcecf3650
font_01_sfnt_off0000ddd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD1 2268 bytes
SHA-256: 72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993
font_02_sfnt_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 11108 bytes
SHA-256: 3ae85632773bac6f92beae04f10efdab31c290c231a85eb6af2c0602639d9009

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