Malicious PDF — malware analysis report

Static analysis result for SHA-256 b896afe1a75b78d3…

MALICIOUS

PDF

77.6 KB Created: 2020-11-24 09:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 29c872bf64545f0ab75b040fcbceadee SHA-1: d22c16f77b4505ad799441bdad3ae62536396f2c SHA-256: b896afe1a75b78d3e9b9bc1d52d0752503aa0e486d4450149b3836fddfd7ec4a
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 0.9996

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/aws?utm_term=amazon+quiz+sanyo+43+quiz+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f9509010305e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8db669d3d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5f9a1a5e67d29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405651/normal_5fa08f59c2806.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://uploads.strikinglycdn.com/files/b401424a-0137-4038-9984-521ab2ec3f74/womapexikuzatajopalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae958a3-24bf-4eef-8191-afe7c52af7ff/94589295752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fd8971-9b07-4b68-ba5f-6d4111c38b7e/99196120299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477b2fa7-18a7-4c1f-8188-3fb3eea73fb3/yo-_kai_watch_fanfiction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d9f983-5dd0-4044-9f93-f674b89c719c/janegorumusejovemitige.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/discovering_ancient_greece_crossword_puzzle_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4765e5-c845-4a3f-b23b-e787ad47506c/woziwidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1775a3c-196e-496c-bdcd-b467f66ecae4/52014243691.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/transparent_paint_pens.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2A 5212 bytes
SHA-256: 73d822bea915189e1049df93de0283916ad6a96ac662e986839f940bc7a4067f
font_01_sfnt_off0000dee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 10800 bytes
SHA-256: 60d228d49181bd8dbf48cd01c2a80af864a53b4fa7fb779d22b0a931123f0338
font_02_sfnt_off000103f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349
font_03_sfnt_off0001190b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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