Malicious PDF — malware analysis report

Static analysis result for SHA-256 12881f28e77f52ac…

MALICIOUS

PDF

67.2 KB Created: 2020-12-21 09:00:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 07d90067c867e7e9623c8c69a82cff26 SHA-1: 5dc23377aba42714c4e33a643aec750bae0dec19 SHA-256: 12881f28e77f52ac9249a138d1521ceca80192c0b70550c9e5e70b44272be86b
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to popular games or educational materials to entice users to click on these links. The presence of a malicious redirector and a high ML score strongly indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/strik?utm_term=stickers+zombie+vs+plants+ps4 In PDF document text
    • https://kusumuwuwudes.weebly.com/uploads/1/3/4/3/134338751/7e072fd29.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/bakiz_minisape_xiwiwofovimubas_vidafunodapir.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/pigafapow_repixab_zabujufasunefiv_tuterufiwabo.pdfIn PDF document text
    • https://zumabenem.weebly.com/uploads/1/3/4/6/134683433/vinavim_jazirizurefudor.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/a69b2a2f087b.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/dorobukasawituw/simile_worksheets_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c49f3b-c85a-4016-992b-3468cda15487/dezaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/ponekikozegen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda65bcc-cc46-427b-befa-1d92cd23e10a/map_of_india_with_rivers_and_states.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/montana_beneficiary_deed_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/neet_biology_syllabus_2018.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_off0000c90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90F 5584 bytes
SHA-256: 634e7805b4752e67919fadd6872dac354e8083e50a199103c70a75ff29af1bdb
font_01_sfnt_off0000dc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 10644 bytes
SHA-256: d23c97b8de589c90f17d124bce73050c688ddf2b7ba54c91925cb07d2e4dcec5

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