Malicious PDF — malware analysis report

Static analysis result for SHA-256 512a2c392e735fbe…

MALICIOUS

PDF

70.0 KB Created: 2020-12-05 18:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f1616a1e0a2e5dc50e108b74fb939217 SHA-1: 1e553b151246f8511521759069871abca4f109df SHA-256: 512a2c392e735fbe8f9629803d68484ca45dbc0ff04db9b1e3cce91d37bfeb92
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gettraff.ru/aws?utm_term=concise+medical+dictionary+apk+cracked In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdedfdeaf37e3b6460991c/1606282749821/saeco_aroma_espresso_machine_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8eed94-edab-448d-a270-a48fe98ee9b0/wumaminasikik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57296884-78d0-4aa2-b224-e1b077fc4bbd/69476696351.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd05428cb11b25c09d14e8/1606223171758/reds_attendance_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140512e9-4389-4ebb-89c8-9bffbcd0d7cd/this_girl_colleen_hoover_epub.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed4f1452f90b7fe57e24/t/5fc263aca97599144e44a4dd/1606575021940/discount_pul_fabric_by_the_yard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93e5c23-125c-4002-91da-005a369fa1fb/10127281260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68250f88-70a2-47fc-bfe0-79f51c2e7c87/zawom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d406997f-61d7-436d-85e5-8417c8738151/sugepababimagivopuro.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/57756182411.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/cracked_apk_website.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd4d1d5d03217661b013ad/1606241566768/runisikivanozexuw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc674e95bcb0228a2a8b315/t/5fc69fd93f75b16643bd8683/1606852570032/tawanagusezabiwurupepe.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_off0000d1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B9 5288 bytes
SHA-256: 7e57c2fd42d26d3b8cae63133d2d88bdfe177a9bcb2d5b21cb3acf122ab73a32
font_01_sfnt_off0000e3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A4 11876 bytes
SHA-256: c7a60de4d16a3332cc1b4f901cd76de57883bd0e9f13931913d55e64fd81b3e7

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