Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3fac9104b44b73…

MALICIOUS

PDF

77.2 KB Created: 2021-06-04 06:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e006a7a36b20c459371d031a38e26b9e SHA-1: 12916d141d9fc2aa5f6e9b0fc036355b4ca22245 SHA-256: fe3fac9104b44b733cd379c93d9627b4417afe466e90b0e6db76e0707d5783da
186 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://philabc.ru/pbw?utm_term=how+do+i+get+roblox+on+my+tablet PDF link annotation
    • https://funiduned.weebly.com/uploads/1/3/4/7/134773133/c8445e53d46c9a.pdfIn PDF document text
    • https://zizuvikugit.weebly.com/uploads/1/3/1/3/131384696/fuzeruzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_6016de5ae6820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408881/normal_5fc6245ab8ad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452607/normal_605f9d332490e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_5fe7ad865dfca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_603effbbba5d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_602a154b483ed.pdfIn PDF document text
    • https://kobuxomibusopi.weebly.com/uploads/1/3/4/6/134609859/2820696.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4384316/normal_60b439a971daa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_602509ac446e1.pdfIn PDF document text
    • https://xuwudivalef.weebly.com/uploads/1/3/4/8/134889087/todopaz-botuxa-lasufa-devij.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/f8ba9a58-ad8b-47ef-9e41-b40418d8bbb1/40819852547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/433e7efb-e970-4423-816b-1cd2a1d3428d/tujunimakabidoxutewivel.pdfIn PDF document text
    • http://ganosidil.pbworks.com/f/valse_andantino_sheet_music_for_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a79d57c-4f4c-4e0a-8473-be5718d8c1eb/70865780695.pdfIn PDF document text
    • http://natofuke.pbworks.com/f/3485126765.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_off0000f09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 5332 bytes
SHA-256: bebf9f79d2b47eefb5b07d88f6aa4528819010fd419f652fef2d4830edf862b4
font_01_sfnt_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 10932 bytes
SHA-256: 844fe4cb489b60952d24b7815079c2f58f3e64c423cafdf0e3a15b1bfadb0f59

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