Malicious PDF — malware analysis report

Static analysis result for SHA-256 590f341d979d3eea…

MALICIOUS

PDF

83.5 KB Created: 2021-03-14 05:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 95a8ce9ed3769564e3a3154bd577a15d SHA-1: 9a4a96a8c9b6afdd67278084e04a9568c4eed4d6 SHA-256: 590f341d979d3eea1ea8063a19d8a34bf0609286d125ca64c69f854ab198d502
186 Risk Score

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 0.9990

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://botokaw.ru/strik?utm_term=superhot+mind+control+delete+ending+song PDF link annotation
    • https://tejukazirinari.weebly.com/uploads/1/3/1/3/131398521/wejuzokutatizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_602cb5f776654.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/machine_learning_algorithms_and_applications.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/178a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_600a566a47bd4.pdfIn PDF document text
    • https://sizuzoxoxef.weebly.com/uploads/1/3/4/8/134846633/pavogajevokifavopes.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/best_short_stories_for_high_school_from_other_countries.pdfIn PDF document text
    • https://jewotefajasofu.weebly.com/uploads/1/3/2/7/132741420/985d21790838.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461219/normal_5fce8c5d0df00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495999/normal_5fd810049b4d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_603d3a41557e6.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/shepherd_the_flock_of_god_april_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486550/normal_601f01911e972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_601b38ce75458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_601153719b418.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/nifalafarex.pdfIn PDF document text
    • http://juvegebufu.epizy.com/diy_bead_roller_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/73662554347.pdfIn PDF document text
    • http://kebanibaru.epizy.com/science_direct.pdfIn PDF document text
    • http://dokedupaguxo.rf.gd/fuletigazerazosusekaxu.pdfIn PDF document text
    • http://mujedofagogi.epizy.com/wufawukefig.pdfIn PDF document text
    • http://tiruweditivunaw.myartsonline.com/accounts_payable_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/77392410974.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/73593389127.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 5380 bytes
SHA-256: abd1e768b1a821d2b8f5e7f4fa010c340e4fa5233c3701bd147170a0d2a481be
font_01_sfnt_off00010445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 11316 bytes
SHA-256: b72a14449baf8913cde058ae18fe4b47688fadef418d3d26fbee3b0722652a59
font_02_sfnt_off00012aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA9 16284 bytes
SHA-256: 9e72eb71cec9de0c778457f6415ace9b059829408473d8201bd10fc7b1fb75ca