Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c70c6c406bf4568…

MALICIOUS

PDF

77.9 KB Created: 2021-03-22 01:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6d2480bcfa890b89603d87a58938ad91 SHA-1: ac2f68a104c8032a3e4c3353906c69ead7f4aaf0 SHA-256: 8c70c6c406bf4568c5a760692d8e2800105b74ad4224b2160cbdd330f4847d3f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external links, including one that appears to be a redirector with UTM parameters, and another hosted on a disposable domain. The presence of a 'download button' heuristic further suggests a lure to trick users into downloading a payload.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/strik?utm_term=past+simple+vs+past+continuous+worksheet+with+answers+pdf PDF link annotation
    • http://xukekutotipepet.iblogger.org/schematic_minecraft_s.pdfIn PDF document text
    • https://dupemokuko.weebly.com/uploads/1/3/4/7/134759865/938523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_60107e643cc2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459787/normal_6047c786dd289.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/ecadddf42fd1ca5.pdfIn PDF document text
    • http://tujozavido.66ghz.com/how_much_does_jocko_weigh.pdfIn PDF document text
    • https://tofoboloronu.weebly.com/uploads/1/3/1/6/131636632/lulizuduviron.pdfIn PDF document text
    • http://rarobaxunugepa.22web.org/fojagedilexevit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fff0229a7b4b.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://baruluzibovog.epizy.com/breeam_2011_new_construction_manual.pdfIn PDF document text
    • http://wiwazisumi.rf.gd/cambridge_english_vocabulary_games_and_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/atheros_ar956x_driver_windows_7.pdfIn PDF document text
    • http://xifabopopotesa.epizy.com/65782395948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ad8106-70b9-42cd-88d7-bb19bb45d3c3/vopixez.pdfIn PDF document text
    • http://momugegunimex.rf.gd/download_divergent_subtitle_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7fdda9-cb2e-4f30-9f16-7cd7e022292b/does_trigonometry_work_with_non-right_triangles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff3818f-6b09-466e-98cf-73562d1472d1/current_news_india_in_hindi_delhi.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/wafagogeneluwoxarosuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 5496 bytes
SHA-256: fbd52a01e682389425f8aa5abb2b30d1bcb474317e82491893aafe300041002c
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 10528 bytes
SHA-256: 1f38923cb390d906dcffcf082cb2093f6578672930f2684d8a3894cdf19730c8
font_02_sfnt_off00011b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B93 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.