Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b74ff25c8aee3a…

MALICIOUS

PDF

85.1 KB Created: 2021-03-03 02:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e616777c1d9b1b4bbd4ea02ec65898d2 SHA-1: 70b87abbb82c127063d12c4b1aa5d550542b3efc SHA-256: 15b74ff25c8aee3a6c796c73a7a9c230575aa2d8336be8402a4ecf70654e379e
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a browser extension installation lure, a common social engineering tactic. The embedded URL points to a suspicious domain, likely serving the malicious payload or phishing page.

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://xajibur.ru/strik?utm_term=will+tron+trx+reach+%25241 PDF link annotation
    • https://cdn.sqhk.co/nusideja/cjdjxjd/online_youtube_video_downloader_chrome_extension_2020.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/lavopimalosagumubebes.pdfIn PDF document text
    • http://tesocoin.online/yamaha_town_mate_t50-_t80_service_manual15nq1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443574/normal_6001d04367cb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421352/normal_600adf5d52378.pdfIn PDF document text
    • https://kimilofu.weebly.com/uploads/1/3/0/8/130873947/tegujojig.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/a_single_shard_chapter_12_summary.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/kupib_duwodubaka_tisijunofirasud_feferakosozakoj.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/how_to_use_mr_slim_remote_control.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/fuduvatexedanuvaxuwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5feb079ede668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485943/normal_603be427a71fb.pdfIn PDF document text
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/lodudisilibozupeso.pdfIn PDF document text
    • http://mediaverifiedbadge.com/alliance_laundry_parts_manualj8bce.pdfIn PDF document text
    • https://cdn.sqhk.co/lelabepena/jbLqGOr/aesthetic_wallpapers_collage_red.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/rojalexipokadaz/medelapewazisotilefomowe.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/52202805912.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/58788370289.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/88784123279.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_off0001036c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 3352 bytes
SHA-256: d1a2d4fe532bcd5fd6a6c3f856c492f8c1fc89fb04d71f04cbcdfefa0eec1db5
font_01_sfnt_off00010f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F66 5080 bytes
SHA-256: 357de3b3c5d1d07c5961fab7a76f6d3fda0e1375c2e0d02caba640f53223e46c
font_02_sfnt_off000120c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C1 11108 bytes
SHA-256: bee6806673e40df0e695d1c6391debb14cda098d25cf581dd78c1171d95d1074

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