Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed668595e324d2e5…

MALICIOUS

PDF

89.7 KB Created: 2020-11-17 07:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee0541a07e8806e0f344bdac1bcbb655 SHA-1: d8e50ad7230ce75111f9b6b69aa7991ff5e91119 SHA-256: ed668595e324d2e5821bf15ab06ded18573fbdb12f983ef2ef013944d23da0b2
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 0.9996

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://traffset.ru/strik?utm_term=ralink+rt3290+driver+bluetooth+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8cc44da2be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8f5b9eb61dd.pdfIn PDF document text
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/goxiboxumivukib.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/nekaxem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5faf86e1c3c62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8ff59809125.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/e524d652433.pdfIn PDF document text
    • https://tafesexetunikej.weebly.com/uploads/1/3/4/5/134576544/volanevoxesa.pdfIn PDF document text
    • https://foxevavudutis.weebly.com/uploads/1/3/4/3/134380199/9132365.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/060508426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f9808cf12be1.pdfIn PDF document text
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/434b4522d17933e.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://s3.amazonaws.com/xefejevife/44550548268.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/faxixi.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/invisible_man_chapter_11_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/tv_guide_melbourne_victoria_australia.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011e20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11E20 26172 bytes
SHA-256: 7ff388b576de7392f3f0dcdf036cfeadfc9d666e2d8afafec173ba426d7fa523
font_00_sfnt_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 5804 bytes
SHA-256: 0c77a33e77d1e69e3edbc9d56ed9ed577c32cd72abb544a08755488fae730197
font_01_sfnt_off0000f974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF974 10708 bytes
SHA-256: 9cbdd9bc072a17e0381a2ac1896b7d42fd4cea1b6147d8059a93b3f8611d76d7
font_03_sfnt_off00014ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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