Malicious PDF — malware analysis report

Static analysis result for SHA-256 282589b9fbc55e62…

MALICIOUS

PDF

74.6 KB Created: 2021-01-24 15:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9702e02cbcfa161cad0962177d2d51ff SHA-1: eff721192ed1a28c341fc8647749057907ffaae3 SHA-256: 282589b9fbc55e62420e609285af6aaeefe7ed8bfbe6a249fa509095a9314eee
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('trafficel.ru') that is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, suggests a lure related to a game or application download.

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://trafficel.ru/123?utm_term=puzzle+farter+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464542/normal_600d6f4d2343f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_5fdada8e03278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472776/normal_5fe9021e275a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462351/normal_6003b793ebde2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369651/normal_5ffce2158550e.pdfIn PDF document text
    • http://riwuveroxuwox.66ghz.com/academia_research_grammar_test_answers.pdfIn PDF document text
    • http://befelofote.iblogger.org/madanapalle_weather_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413235/normal_5fcb9d05a7c01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagolugumetuvo.epizy.com/animated_instagram_stories_templates_app.pdfIn PDF document text
    • http://ketanuviz.epizy.com/android_shopping_app_source_code_free.pdfIn PDF document text
    • http://bejopobu.epizy.com/eclipse_oxygen_for_mac_os_sierra.pdfIn PDF document text
    • http://gifesikubelazu.epizy.com/77089858607.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/combining_excel_worksheets_vba.pdfIn PDF document text
    • http://riduxipilitaj.epizy.com/52081707510.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/albumin_administration_guidelines.pdfIn PDF document text
    • http://muweluboxakok.rf.gd/destiny_1_raid_report_d1.pdfIn PDF document text
    • http://bozalusi.epizy.com/free_tri-_fold_brochure_template_indesign_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/lol_sylas_support_guide.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_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 4768 bytes
SHA-256: 940796ccb043536973d7d89ace424b9c014deee6b95c047c2a1b55233e29789f
font_01_sfnt_off0000f909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 10704 bytes
SHA-256: 21271b7cb6cb53e7436e1a0bf05beef520926fa322f02c193f24af3e8dcf1498

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