Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4f96fbc9c6a332…

MALICIOUS

PDF

68.5 KB Created: 2020-11-16 12:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5191eb809d0b5e4b0e78999c92200ea6 SHA-1: 974836e4e37a309d43743472e56fdccedb55e7d5 SHA-256: 5a4f96fbc9c6a332181e1164ecbc0edd800a131d167d30964728183883688af2
174 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. It uses a callback-phone (TOAD) lure. 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-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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?utm_term=shasta+county+recorder+fees In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f88bc6ee25c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f9f218911ed3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f8f9fdff1b01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_5fa1dd103b12a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_5f8ab8532f99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8945ca40c48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f8834ec7e041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404959/normal_5f95179b249cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5fadf5a09ccbd.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/wibadinavosunom/porphyrias_lover_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67586dd-de8b-4cc2-8f10-76d506caa7fa/28042790287.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/big_time_rush_christmas_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bc11bc-ca6d-4771-80b0-45bbe39e0b0a/55532967327.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_off0000cd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD53 5284 bytes
SHA-256: 9d41f1bce33b73e16642066784f3e7f075fd0403182e9ebb8c6f429fbe2707c5
font_01_sfnt_off0000df4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 11764 bytes
SHA-256: 8d3c48746c179a87f5e958390c82d86718fe5881fd386e8953cbed17ceba43d0

Open this report in the interactive analyzer, or submit your own file for analysis.