Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffdaccf1f8726fb…

MALICIOUS

PDF

74.6 KB Created: 2021-03-20 05:25:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0ff2ceadbfc699ec3e60d563809775b4 SHA-1: 7af38eafc7b00c3613f9f53ee59e7e63624899d1 SHA-256: 8ffdaccf1f8726fb4e31ea192fabad3945add3f5fe28985e1dde74224c6f2e11
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to disposable domains, indicating a link farm or phishing lure. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=365+bedtime+stories+and+rhymes+pdf PDF link annotation
    • http://fakaluwu.scienceontheweb.net/mofilesinan.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/f9a8bf08e4dd8c.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/what_is_an_ecosystem_biology_worksheet.pdfIn PDF document text
    • http://pubggaming.online/1793041634646rnr.pdfIn PDF document text
    • http://xuribof.medianewsonline.com/best_way_to_learn_arabic_as_an_english_speaking.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/7675442.pdfIn PDF document text
    • https://bezowaki.weebly.com/uploads/1/3/4/6/134611163/69dc461.pdfIn PDF document text
    • http://istlan.space/8905588456yl8d3.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/guturadoneras.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/bidofejufi_bupebubiber_tukukunuvekebo.pdfIn PDF document text
    • http://tokio-2020.fun/60281747712jg2z9.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/guided_meditation_for_stress_and_anger.pdfIn PDF document text
    • http://doorstepcomputers.com/amor_del_alma_vicente_fernandez1rzx5.pdfIn PDF document text
    • http://mybestchan.online/83555595943ar0aw.pdfIn PDF document text
    • https://tinozuxitijerel.weebly.com/uploads/1/3/4/5/134528375/823c4d26b1dec.pdfIn PDF document text
    • https://velineninebag.weebly.com/uploads/1/3/4/6/134608195/635889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/66940e74-5702-4ffe-8ba7-f92749b6a0b9/calibrate_samsung_uhd_tv_6_series.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/viktor_frankl_stimulus_response.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec9d18e5-e545-4f9e-856d-7f97cd55e5c7/what_is_the_salary_of_isro_scientist_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97056b1b-133f-4482-a479-331cb446999a/how_to_simplify_exponents_and_radicals.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 5840 bytes
SHA-256: 90f9cd56de96f71778951620fac1369e1aa1e256130b2d5c88c7d131c6af760a
font_01_sfnt_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 11088 bytes
SHA-256: 6965ada1f36f6922b35d5022a1a7e08b96437c2c5c28dee5945a6c454aeb7cd8

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