Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24ee88c8e107fa7…

MALICIOUS

PDF

91.1 KB Created: 2020-12-30 22:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 367f0069456f5c3ff33ba7fa79c0ee30 SHA-1: 62eb47bad2822cff99b5366327af45a3d342c9f7 SHA-256: f24ee88c8e107fa74ae16f363d57f384093fa4b467d1449b2f1ef40655e17458
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 0.9997

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/123?utm_term=certo+to+pass+drug+test+2014 PDF link annotation
    • https://bivovipolever.weebly.com/uploads/1/3/4/3/134347360/lupararadixuzuj_wetosilisejo.pdfIn PDF document text
    • https://xiwapidijiz.weebly.com/uploads/1/3/4/5/134511693/wegopigupuvetadelop.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/zebaxena-motovi-forotigewaw-daziloz.pdfIn PDF document text
    • https://famosufed.weebly.com/uploads/1/3/4/9/134900490/2338242.pdfIn PDF document text
    • https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/36799.pdfIn PDF document text
    • https://fexemefamerera.weebly.com/uploads/1/3/4/2/134236105/roxadef.pdfIn PDF document text
    • https://runevivapubate.weebly.com/uploads/1/3/4/5/134595370/jijoxilukodove_rasafedesipo_paxuwuwoxivufa.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/jcjiFgf/cookie_making_iphone_apps.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/1ff3064.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/4662221.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/6799824.pdfIn PDF document text
    • https://nisixokavenofaf.weebly.com/uploads/1/3/4/8/134891603/nikunukemufosusiw.pdfIn PDF document text
    • https://vususutuf.weebly.com/uploads/1/3/4/6/134634118/ribuvijabar_rirife_jazurise_telabalixe.pdfIn PDF document text
    • https://baveretam.weebly.com/uploads/1/3/5/3/135314503/ca91806a9ee.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F6 5260 bytes
SHA-256: a3fc69e2709b02fafce7c701e71344ca2849d22b9e7ef4e525dbc4d8c00cdd0d
font_01_sfnt_off00012bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEE 10956 bytes
SHA-256: 6d199e2a91442ade0c36a62f2ff5e72b3981dfca73d17bdad7f9e1c58dee9530
font_02_sfnt_off00015154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15154 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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