Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ffd5bb7166426e…

MALICIOUS

PDF

65.4 KB Created: 2021-01-19 22:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d0d39e6596d3789c1504a802bde1ebae SHA-1: cf69fc6e3ea745a8cdd181addc52ad1b953a0050 SHA-256: e3ffd5bb7166426e10366266011a9f779a6572eeb6bc831900824d03a93aac21
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on external services like Weebly and Mozfiles. The ClamAV detection and ML classifier also indicate maliciousness, with ClamAV specifically flagging it as Pdf.Phishing.Trojan. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to potentially malicious content or engage in SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/123?utm_term=unblocked+movies+free+at+school PDF link annotation
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/7405667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fc6b3c59e56a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459929/normal_5fe0f6f5cebba.pdfIn PDF document text
    • https://site-1172263.mozfiles.com/files/1172263/formula_for_area_of_a_rectangle_and_semicircle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404987/normal_60003a7ce139f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384154/normal_5f978881a54f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496378/normal_6003425eb53e0.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/dejipibodode.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/6485387.pdfIn PDF document text
    • https://site-1175164.mozfiles.com/files/1175164/moto_x3m_pool_party_level_17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419410/normal_5fc74abaf2626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461219/normal_5fff99a9beb1a.pdfIn PDF document text
    • https://site-1211253.mozfiles.com/files/1211253/zefofuxabuboginalomeju.pdfIn PDF document text
    • https://site-1166067.mozfiles.com/files/1166067/iceni_guide_rome_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411220/normal_5ff104a2d11d9.pdfIn PDF document text
    • https://site-1176547.mozfiles.com/files/1176547/dagannoth_kings_osrs_duo_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_5fba2e85bb0be.pdfIn PDF document text
    • https://site-1168401.mozfiles.com/files/1168401/nubapejekulew.pdfIn PDF document text
    • https://site-1175608.mozfiles.com/files/1175608/android_studio_shortcut_constructor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476750/normal_5fcee572a546f.pdfIn PDF document text
    • https://site-1227499.mozfiles.com/files/1227499/hollywood_reporter_oscar_predictions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5feb82b588b37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC402 5516 bytes
SHA-256: b85b960f13af30c065c5be297b5f2bb075d0954a73fc2ca3e604519cfbc015cf
font_01_sfnt_off0000d69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69F 9880 bytes
SHA-256: 8b927664f54c6528e6bec1d4dbf7bbd1ea6b9e87dc5ade36942e90612d9bcc50

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