Malicious PDF — malware analysis report

Static analysis result for SHA-256 38853e859ba7bcc6…

MALICIOUS

PDF

75.7 KB Created: 2020-11-11 03:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1290253f5b60ec405685e6fab5925614 SHA-1: 168dd230eb18d45ec51ba9c152632c6563925573 SHA-256: 38853e859ba7bcc6564d127b8d76d6e3a4e961b0829c8424553792f967d2e055
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 0.9998

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.
  • 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://cctraff.ru/123?keyword=gmod+gm+mall In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f881a3c4006c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f87d3384a1d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f9f22870dd6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_5fa0a265c78ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f872436e2d79.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/29927dc9-a469-437a-9f84-bae1afc8fd6a/fotedofolikipax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3104b60d-a429-49e6-976f-6efffacc8295/tixubixegabulowux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f60845b7-35fc-408d-a55a-b526258af172/87353577230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a03a7b-9049-4169-9df1-80577c826fb6/unit_4_progress_check_mcq_ap_us_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b18b8e-0262-44b8-a729-ef2f6d56dac6/15226854120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f31525-cca2-49c8-b81a-5712440789cb/99915883578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3455e9d7-5270-416c-af01-a744ef3f6f62/plato_5_dialogues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebf6480-0225-4e1c-b6ec-03c01eb2b64a/91648695372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787cc88d-c62e-446b-938b-f12a5cd1e6a0/25226861891.pdfIn PDF document text
    • http://i.imgur.com/2TTpR9l.png[/IMGIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 4900 bytes
SHA-256: 0870fcb2ee36369caf002580267bf4f8043a5dd6599082f74861e66ecd429873
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 10696 bytes
SHA-256: 9ff983525bbb4fd3028fd2fa3728be521528f5e50b6862c9e1089513c225c6b8

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