Malicious PDF — malware analysis report

Static analysis result for SHA-256 4256bc70f30a06ca…

MALICIOUS

PDF

416.3 KB Created: 2021-12-17 04:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 06b2c486c593671005bfaeda05638a50 SHA-1: 36eb8b2d6193855fef8ebca175f2e3e3182ba63c SHA-256: 4256bc70f30a06ca421f982204634e33c1c33f4a4b19bb1d6c1b2e901223740f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4866

Heuristics 7

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://allytemp.ru/uplcv?utm_term=mta+bus+map+brooklyn+b8 PDF link annotation
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7c1dbc7ba---xatukukugija.pdfIn PDF document text
    • http://silexsys.com/ckeditor/kcfinder/upload/files/jexiw.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16181775d5da55---47958481007.pdfIn PDF document text
    • https://otomatcilarmetal.com/otomat/upload/files/xufolebes.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/76754028306.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/gsgqa6h806j0sf43icdi68ufi1/51537398131.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/josapa.pdfIn PDF document text
    • http://jawarakreasi.com/file/purolazizenamav.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/duson.pdfIn PDF document text
    • http://apnm.indexint.net/ckfinder/userfiles/files/14919503096.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/24688252010.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1618b6e11305e7---gadilodemenop.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/93540740792.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/13484583069.pdfIn PDF document text
    • https://memo-log.com/userfiles/file/14830910993.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/japinoxusomajo.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/6329559124.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/mitikivi.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/jikavaviduxunivowofu.pdfIn PDF document text
    • https://12shio2.com/contents/files/15853085943.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/5701756951.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/doruve.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/fosuvefe.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://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_off0006137e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6137E 10836 bytes
SHA-256: 35b0dd6929b9d68635309968f73726784358d3459eeb04439a4a7d9d7b37b7e7
font_01_sfnt_off00062c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C53 18188 bytes
SHA-256: 6f1c80012faffcfa17217d7fda3c2da65edccaf97f0e91e51ad0a389c9092bf1
font_02_sfnt_off00065ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BA2 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336