Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c66cfdcce91dd0…

MALICIOUS

PDF

89.8 KB Created: 2020-12-27 22:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bb515f8fc610c15f44c4620580446f54 SHA-1: a35b937723e221493295fba495768d803ea1f06f SHA-256: e8c66cfdcce91dd0fb0bef72eda1e1d663589c6b7f16873ddcbde9d0138c3f41
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a high-risk alert for requesting recovery secrets. The embedded URL, https://traffmen.ru/123?utm_term=fender+super+champ+xd+manual, likely serves as a lure to a phishing site. The ClamAV detection and ML classifier further support its malicious nature, indicating a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/123?utm_term=fender+super+champ+xd+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4413119/normal_5fe44a887dba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f94142c812fd.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/ghe0jgc/amazon_kindle_library_books_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_5fd2d72b67984.pdfIn PDF document text
    • https://cdn.sqhk.co/midusuworab/Kcmegij/zeds_dead_jersey_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8df7c8a09e7.pdfIn PDF document text
    • https://cdn.sqhk.co/voduzetefir/yigoicT/android_launcher3_source_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5fdc429062854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464709/normal_5fa38ac6d8eb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_5fd1991c30ad5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ditiruz/xugenozubi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/csp_full_form_in_yarn.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 5808 bytes
SHA-256: 1748ce059502feab7e69a17f24eb3a1d040f14ea0cc6905e18e497b4e879dd9a
font_01_sfnt_off000114bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 4980 bytes
SHA-256: dfef46d80482ff4bcfb52b362536e36d7457076b3bb482e56eff02f09dcb8bba
font_02_sfnt_off00012571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12571 11284 bytes
SHA-256: 82672e4e1fea3575f7ea56ec85dffd3fb7e80a8910eddbc4d37db55950a37bc5
font_03_sfnt_off00014bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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