Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13ee60f62104316…

MALICIOUS

PDF

78.0 KB Created: 2021-03-21 12:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 23a876de4e44cf6cc75881d56d9f178f SHA-1: 52bf0b65a1a1649b5bfdff4aaba16ec26f347cde SHA-256: d13ee60f62104316cdeecd1200d68e4449a957e20bfc1c320a35c11db710ba5d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The primary URL, 'https://ponafet.ru/award?keyword=ways+of+the+world+3rd+edition+pdf+chapter+6', is presented as a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://ponafet.ru/award?keyword=ways+of+the+world+3rd+edition+pdf+chapter+6 PDF link annotation
    • https://jokiwuruxuwam.weebly.com/uploads/1/3/1/4/131437523/jiluzajovele.pdfIn PDF document text
    • https://rimowaxa.weebly.com/uploads/1/3/4/6/134610435/5395443.pdfIn PDF document text
    • http://xilutemomeliro.iblogger.org/73467386400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://timadulikojig.rf.gd/adobe_lightroom_android_4pda.pdfIn PDF document text
    • http://zisunajupanege.rf.gd/xavuzuvaserudinurasep.pdfIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_45ca8c5e4f7c4ee0b2c672c7e828a799.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/74522738113.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/kefabure.pdfIn PDF document text
    • http://fefawitot.rf.gd/26902253769.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_2d0d5559202d445db80850eb788124a9.pdf?index=trueIn PDF document text
    • http://setiwol.epizy.com/crusader_kings_2_game_of_thrones_mod_keeps_crashing.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/examples_of_chemical_energy_transformation.pdfIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_bb951d40e191454ba3959552b3e5826c.pdf?index=trueIn PDF document text
    • https://8cbac2e2-8cce-4a87-a713-b942b56a5848.filesusr.com/ugd/738632_62cbe71729d244119994610a49725e1d.pdf?index=trueIn PDF document text
    • http://xewowibaxe.rf.gd/46249093003.pdfIn PDF document text
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_c392853baffa4a989e74e5610651ec31.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_684c8917b4834f11bb3d58f334dcd58f.pdf?index=trueIn PDF document text
    • http://fositelorefux.epizy.com/fibote.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/21617693559.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_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 5768 bytes
SHA-256: 884f78f7de40a9311dec03067c34819472b1ad9e336b3573f0e636ca2347ea9a
font_01_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 10024 bytes
SHA-256: c561092fdb9d6c0e2184e317586673202fa102668721f4561689d60616e1b1b8

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