Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2a053e3d9df635…

MALICIOUS

PDF

70.1 KB Created: 2021-03-27 15:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41984b866af4c92d87d0620df44213ac SHA-1: 5532e13e594c3445c7416fbc88b595b2fc67682f SHA-256: 4a2a053e3d9df635d3ba6d52ffe1cb0f852afa43ebd96fbb838e0c0c63ace0d6
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a phishing or scam attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the high ML score strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure points towards a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=unblocked+games+66+cookie+clicker In PDF document text
    • http://fruit-ital.space/dorotesozugunazejubobo18epb.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/nelimopigasewoke.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/personal_narrative_powerpoint_3rd_grade.pdfIn PDF document text
    • http://graatorama.fun/musical_word_search_puzzles_printable_for_adultsm2bxh.pdfIn PDF document text
    • http://smartcoin.design/vetiritozitune4myzu.pdfIn PDF document text
    • http://unreguezff.rest/t_mobile_cellspot_router_specs9j4oo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_60148ade95186.pdfIn PDF document text
    • http://nesobaka9.xyz/comptia_server_sk0-_005_study_guidex46g5.pdfIn PDF document text
    • http://socialwave.me/bimafibigelodetavaxidzr24.pdfIn PDF document text
    • http://mebelintera.ru/nazezvcpwz.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/sakedonomewenuwopa1komo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384145/normal_5fe58a6ee60bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_6022d0ebcfb0a.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/jcr_journal_citation_reports.pdfIn PDF document text
    • http://egosikenclub.com/anglo_assamese_dictionary_freeds5fj.pdfIn PDF document text
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/nusubi.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/147476.pdfIn PDF document text
    • https://mekaxojukana.weebly.com/uploads/1/3/1/3/131379168/1856959.pdfIn PDF document text
    • http://erogan-columbia.site/asus_rt-ac85mr_ac2600_router_reviewdhrbs.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

Related samples 8

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_off0000d609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD609 5608 bytes
SHA-256: 7726b270ed0cacf1f1950257cda6f2c16d1417dc651e49509ff8b681278bd391
font_01_sfnt_off0000e904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 9948 bytes
SHA-256: 956e791e5ad651c81d9b11a44e15ec74ecc01bae20a16f17ce24f4a8a989a8e1

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