Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cac6476553e16fc…

MALICIOUS

PDF

80.6 KB Created: 2021-04-25 16:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e52c5ab0e1779ff80d84071f05a6ffa2 SHA-1: 11f789f54cb915cc0496b4917c15bcf120180eff SHA-256: 9cac6476553e16fcc850953572d77a5ff8a56c2a0dbcb0132501c9fe7c6b8b09
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://druttle.ru/strik?utm_term=damn+good+advice+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5ffa017d613cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_605238439928d.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/akkNXT3/bexuwakizolobakefajumut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_6049e57e25f0f.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/sQ0jbll/15099224623.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/ezWT4FK/bufawujog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8e303d0-f350-43d2-b7c3-f886ef13ec25.filesusr.com/ugd/1bb397_a37cdfd0ff414f7e8a9b76aab21022f7.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_6b1600bc9440448daa1f626337465dfc.pdf?index=trueIn PDF document text
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_ad1e30fe3da4419ab747af8e5a3ff824.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_7a0b92eacdf54f279f42db7e62feece4.pdf?index=trueIn PDF document text
    • http://tezibezob.epizy.com/onan_generator_repair_manuals.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_ec30dabfd9b64030b4d0eb68f6993199.pdf?index=trueIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_1385ec9444ba4d438161c30209e8d359.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_16c7c2ffd6b0463aa789698776321410.pdf?index=trueIn PDF document text
    • http://sajorasuxanuvil.epizy.com/zolasanugar.pdfIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_3a3f630863a94f1dbd96923b6b5a2924.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_a8482aba5de646d8b91777a59a2331e1.pdf?index=trueIn PDF document text
    • http://rojelolazekozox.rf.gd/geometric_transformations_yaglom.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_6fe0ead9a4614e58a6c548528049d650.pdf?index=trueIn 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_off0000fcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 5228 bytes
SHA-256: 0e1d4e6321d0c5a3b2c9cfe4e815c11868f41a8991459ead244a64fb6669e2a5
font_01_sfnt_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 11300 bytes
SHA-256: 057feb07c987e9870b2fc2cf1db01abbaaba916895590f5189f9dac1c305b927

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