Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9a52cd83b7c54b…

MALICIOUS

PDF

345.3 KB Created: 2021-03-19 00:17:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e221935d49cb99ed16dae1d39664fc25 SHA-1: 7e2400d6fa760af4330290c15291c23364c1c527 SHA-256: 4f9a52cd83b7c54b83927916290ebcf496d1853c3c92fd7452a62b2f3a50b883
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The document contains an external URI and a high-value business-email-compromise pattern suggesting payment redirection. The presence of a download button lure further supports the phishing attempt, likely leading to the download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/award?keyword=cambridge+english+empower+b1+pdf+free PDF link annotation
    • http://mmamba.ru/vatajuxumujisusot4wrnq.pdfIn PDF document text
    • https://bozetefaz.weebly.com/uploads/1/3/4/7/134733050/xefebebikut.pdfIn PDF document text
    • https://pujowuvorokom.weebly.com/uploads/1/3/5/3/135347933/1f636e8aba67a78.pdfIn PDF document text
    • http://tuzotumefakorok.scienceontheweb.net/english_speaking_course_for_beginners.pdfIn PDF document text
    • http://supajukiligado.22web.org/47920750529.pdfIn PDF document text
    • https://jigudeganulufis.weebly.com/uploads/1/3/6/0/136054519/xodubovadifirugamagi.pdfIn PDF document text
    • http://plusstore.pro/63301004481m8pq0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zobemodorujo.rf.gd/gujozinuzorufukabozolemi.pdfIn PDF document text
    • http://femagela.myartsonline.com/pdf_ausfllen_online.pdfIn PDF document text
    • http://xowomowipuzu.epizy.com/nexarolebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8493ef96-120c-448f-89a8-22f72b9c3dda/what_year_is_my_new_home_sewing_machine.pdfIn PDF document text
    • http://pewubik.atwebpages.com/nikok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60aa3b89-79a6-4dda-a308-5fea962aae7e/cleaning_kitchenaid_stove_top_grates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157a40ad-4493-403e-9dad-1b3655627b4a/48772987362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2d3669-c42a-48fa-b70f-5c46b89aeab7/kenmore_90_series_washing_machine_parts_diagram.pdfIn PDF document text
    • http://moxixezegosa.onlinewebshop.net/the_bible_in_arabic_sidney_griffith.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a49bc6-024f-4486-b3fa-84765608fa34/8273169765.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/93952264926.pdfIn PDF document text
    • http://xafekejo.epizy.com/what_does_sahib_mean_in_arabic.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004fcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCFC 5644 bytes
SHA-256: 25630b3803d67336d6a29d7d1f74c9e9445303b5a24006c6e8f0d72232c0322f
font_01_sfnt_off0005100e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5100E 14464 bytes
SHA-256: 5e4da8d13516bb1677cc4b78567e3ec3f29d400bcbf403e215b407195f5ba63c
font_02_sfnt_off00053fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53FBB 16284 bytes
SHA-256: 15b3e1dbb9946b03220896cf0b72fa5e39f337e3e3737d867298db659e05b1f5