Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1e97ddead88b15…

MALICIOUS

PDF

83.8 KB Created: 2021-03-01 01:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3a946dadb862438fddee6eef9d96b513 SHA-1: 18b82263df73a56a0e2811de7ce772507a045e2e SHA-256: 9d1e97ddead88b15b9ca40ad9114e99d7926e7ee3d1178812c425bbb36c87283
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 0.9998

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://resalured.ru/aws?utm_term=cultivo+de+pina+en+colombia PDF link annotation
    • http://koolmaxt.online/366404416871s5hf.pdfIn PDF document text
    • https://lorotorerusut.weebly.com/uploads/1/3/1/4/131452969/03c3c1acf1c6.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/o_que_comer_para_no_engordar_na_menopausa.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/6207362.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/5915493.pdfIn PDF document text
    • https://vuxabodunufa.weebly.com/uploads/1/3/1/4/131407539/5126527.pdfIn PDF document text
    • https://gapuropiti.weebly.com/uploads/1/3/2/7/132740804/2891292.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/c0d7e57796.pdfIn PDF document text
    • https://nurivotewifigex.weebly.com/uploads/1/3/1/1/131163684/733792.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/76452443619.pdfIn PDF document text
    • https://diwimiwiwomenen.weebly.com/uploads/1/3/0/9/130969795/zuzuwekoraruv-pojofo.pdfIn PDF document text
    • http://xtrading.buzz/acorn_180_stairlift_codesqc20d.pdfIn PDF document text
    • http://perfectiona.online/honeywell_programmable_thermostat_manual_rth230bcaai2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xopoluranolaz.rf.gd/66171704343.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/how_to_assemble_shark_navigator_lift_away_deluxe.pdfIn PDF document text
    • http://dibulokesimerog.rf.gd/43005505405.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/57096424592.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/metal_gear_solid_1_pc_cheats.pdfIn PDF document text
    • http://duliwijedij.rf.gd/penny_stocks_for_dummies_amazon.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_off000109ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EC 5048 bytes
SHA-256: 1732ea742e97a67a56ae3984c7c2954239124be4f546146c00fb51ff1e52439d
font_01_sfnt_off00011b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B09 11412 bytes
SHA-256: 31ff65647f93d35cdea090e770fc96f25af956b24da27dc687be84c7840a66a9

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