Malicious PDF — malware analysis report

Static analysis result for SHA-256 086bfd2e4edd7f77…

MALICIOUS

PDF

74.1 KB Created: 2021-03-03 17:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6d84c3ccbcb573327b1406f9c0029c79 SHA-1: 9463e37c5387c52ab7915efbec9564b16ce82287 SHA-256: 086bfd2e4edd7f777fefe17dd6d54f6e8fbcac0e3cf754db86c8eacb0d91c507
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily corrupted, appears to be a lure related to product information, further supporting a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/award?keyword=redmi+note+4+miui+11+release+date+in+india PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492871/normal_6003726cac8f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470841/normal_60184f29ec771.pdfIn PDF document text
    • http://zoo-taxi.site/what_drinks_are_available_at_taco_bellu2cb6.pdfIn PDF document text
    • http://daliadiago.com/mifufqqit7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374009/normal_5ff8b3bdb1c02.pdfIn PDF document text
    • https://kivalake.weebly.com/uploads/1/3/4/8/134885121/64f34f7e3b64b29.pdfIn PDF document text
    • http://menbp.online/81378771032pines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367268/normal_5ff481858aa6d.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/pipaneku/56292266641.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/mufuja.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/android_studio_2._1_2_free.pdfIn PDF document text
    • http://puzuritutu.rf.gd/logo_design_app_free_download.pdfIn PDF document text
    • http://renedutej.rf.gd/29394961932.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/how_to_install_playtex_diaper_genie.pdfIn PDF document text
    • http://rafopaju.rf.gd/35920904713.pdfIn PDF document text
    • http://xefejada.epizy.com/dhl_shipment_airway_bill.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_off0000e007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE007 5120 bytes
SHA-256: dc5103c29cd9ed99f37e3d8c01f0e7c87e6d6e6e50e6cbdbff7a25f137a4896e
font_01_sfnt_off0000f15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15F 13120 bytes
SHA-256: 4a48c76ae2e22ed0499ef362bae11b39d969e85902e38cc6d845df0a074ee3ec

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