Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed59b1b565454a9…

MALICIOUS

PDF

88.6 KB Created: 2020-12-03 11:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: af898bb769ff40b8e9c249902f31b15e SHA-1: 1e36908b54918f92564d14e3157dbda4de1dd396 SHA-256: fed59b1b565454a9025bafd1c41b766cf748de8ad5978669dfdad351b196a7f7
226 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 password-protected-archive lure. 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 0.9997

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffnew.ru/aws?utm_term=ff14+crafting+leve+guide PDF link annotation
    • https://bupefozatige.weebly.com/uploads/1/3/4/3/134384552/gefirir.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/9884726.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/2527cdfac6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_5fa6c87ed4f69.pdfIn PDF document text
    • https://roluliduz.weebly.com/uploads/1/3/4/7/134771057/578288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8e9315b877b.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/vedomiru.pdfIn PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/zaxolapiwi_jitulobojoxod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484812/normal_5fc40d2c52ae3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f99208432dac.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/ce02014a20d.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/8087d740-05e7-4a1c-bb5d-e88c6258f1f6/eso_furniture_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/access_icloud_music_library_on_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339717ee-dcff-4ed0-a2ae-5f2ca21fb1d3/filetype_xls_login_password.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E8 5168 bytes
SHA-256: fcea9330b94b508f330a4477da4f3682958d3dd64c29f72cf778844abfc60de2
font_01_sfnt_off000124a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A1 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00013004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13004 10676 bytes
SHA-256: 8d735d8c4615494b7f474292a510e6d56ce39f9e5ac808d5efcf2dd862301068

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