Malicious PDF — malware analysis report

Static analysis result for SHA-256 903a9ef0ecfb854c…

MALICIOUS

PDF

75.1 KB Created: 2021-02-28 14:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a0115f7fb72e10cfa8e601aab0b905f4 SHA-1: d8f98abc318e0c74e7919a184d4415847cf0d463 SHA-256: 903a9ef0ecfb854c6da1059711d668ea9033b3dc4b8433c52fd3576a65bc1728
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to educational materials, directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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://seumenha.ru/wix?keyword=the+american+journey+workbook+answer+key PDF link annotation
    • http://rubeatyshop.xyz/vuzubojizesefirirobenej6czjn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_600d28515b536.pdfIn PDF document text
    • http://robertferrell.net/milton_barber_shop_brooklyn_robberyxtmld.pdfIn PDF document text
    • http://makedctl.site/how_to_repair_a_culligan_water_softenerjqdng.pdfIn PDF document text
    • http://petersikdar.com/82456533634vbj9a.pdfIn PDF document text
    • http://blablablacar.online/cash_flow_management_strategies0bni8.pdfIn PDF document text
    • http://maxist.ru/kimikedafabunifojazizikok0mf7.pdfIn PDF document text
    • http://petersikdar.com/zapedoxuranukasalela1ptt0.pdfIn PDF document text
    • http://varnisvakq.ru/nijexafevifavowidibatora38yv1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fffee1157e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_600fcbd461be8.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/excel_online_training_classes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fe5e1672bd9b.pdfIn PDF document text
    • http://good-production11.site/63365480783bgt7s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_60370c9c94608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rikirusekufipu.epizy.com/dosabafaguzunuwego.pdfIn PDF document text
    • http://zuniguvip.epizy.com/geometry_worksheets_7th_grade.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_off0000e5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 5428 bytes
SHA-256: df7fb012ad3f05e52fb26201c0349fb52d5b3f5b168523d1f437012b87b78392
font_01_sfnt_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 11032 bytes
SHA-256: f41bd8570f572e49d3ee77e8a5820ef5c6a94cf273c93c2a64adf07db05c9302

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