Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca00c37aa3447a21…

MALICIOUS

PDF

69.1 KB Created: 2020-12-11 00:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 986d609c9411780b3ca5b3dd9d837e73 SHA-1: 91eab073e5c441b02e2561251068db2a48c545e0 SHA-256: ca00c37aa3447a21301d354eebcc85bb411d144a374c959778eedd53fd452295
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://digokevun.weebly.com/uploads/1/3/4/7/134747151/vifezuxafatu-fikuvu-zawin-wanuvowefixevog.pdf.
  • 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://ggtraff.ru/strik?utm_term=pokemon+go+mod+apk+download+for+android In PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/vifezuxafatu-fikuvu-zawin-wanuvowefixevog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_5fc2aa39259e6.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/lomedotewizidinak.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/ab746fbe-7254-4797-ad46-6fb6184d7548/robert_d_campbell_jr_high.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008d10c8-e55e-48e1-afa5-a4c2cc483eee/gestime_aphp_fr_planning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2b2f29-783e-489f-bd0f-3f9dd7aa4624/46752831904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464972cd-9f35-40cd-93f4-80253987c797/83489875969.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56016a13a450bab124a3f/t/5fc9fcf2ee6dcf7e363708d9/1607073011312/fiziburele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90bcb76-ca43-40b2-b61a-ae74223ac599/piano_method.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/game_age_of_empire_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/komodisove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65c91b3-203d-4714-b063-bcabee9b82cf/rotimebobomevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a31b84-54ee-4c76-934d-e0ad6962ed57/wisawanajuwuwemelolibif.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_off0000d0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C4 5340 bytes
SHA-256: ff4aa90c1bb136432e2fbea9760a5a2bfc1bbb82e7875652b8bb513dbb12bc65
font_01_sfnt_off0000e2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 10944 bytes
SHA-256: 208a3ebb6d5a8abf7ab30182778f35b41cfc47c2a6f87c372aa2b5df0f2b79b5