Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bda09f089f74221…

MALICIOUS

PDF

427.1 KB Created: 2021-04-02 09:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d5751b19d0ce611fd73f8460ca8dfea SHA-1: 28c16d8cf711edc4500b5d6cb2ac4bd7b93bf8b6 SHA-256: 4bda09f089f742210b8b5c31265c9502789644791c4c8fc402d16b9fbdb746b9
136 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-confidence heuristic indicating it's a phishing lure, linking to an external redirector URL. The ML classifier and ClamAV detection further support its malicious nature. The embedded URL likely serves as the initial point of contact for a phishing campaign or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8966

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/wix?keyword=monilophytes+homosporous+or+heterosporous PDF link annotation
    • https://s3.amazonaws.com/nimuwet/woderaxopolirux.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/rasaxivumakidibaweke.pdfIn PDF document text
    • http://bonapimum.iblogger.org/vamugidijekesefa.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/dependent_personality_disorder_treatment.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/pdf_file_to_jpg_converter_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/72141191034.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/what_is_the_best_sphr_study_guide.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/dojasazonaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_602826816a8cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fcda073ab7ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_60284647d39ff.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/nebuledorilixob.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/what_killed_mansa_musa.pdfIn PDF document text
    • http://bukenisefino.mygamesonline.org/why_was_divergent_banned.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5ffd4cfb61a9d.pdfIn PDF document text
    • http://fudidudigas.iblogger.org/972083463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_6020592f18262.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/brahm_kavach_path_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tegazadolital.rf.gd/what_are_good_second_jobs_for_teachers.pdfIn PDF document text
    • http://dujepuxa.rf.gd/analogas_verbales.pdfIn PDF document text
    • http://zovibeviniga.myartsonline.com/rivemi.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 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_off00065bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BAC 4956 bytes
SHA-256: c942646e58f19d06143d6dd2e21edc35a90a800a0323c355fbb6bfba05ff42da
font_01_sfnt_off00066c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C6E 15224 bytes
SHA-256: dbad1d93ae8515198c6892ddba56e35e16867eef9754bac40e053fcc70c53e88

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