Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d847e57519179f1…

MALICIOUS

PDF

72.2 KB Created: 2021-09-27 21:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: efad94cde1b4ec4ba457f5e8e26618d0 SHA-1: 51e0721d1a1db8afa2fe1863ca2ea60db6e6b599 SHA-256: 5d847e57519179f1bdb2d3c314679421b8a2569e4e73a6f07e96848539b80f90
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The embedded JavaScript likely facilitates the redirection or download of further malicious content, contributing to the phishing and trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=kotlin+fragment+tutorial PDF link annotation
    • http://serdceprirody.ru/userfiles/file/lemebapakipomif.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/wiwagope.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/11639852916.pdfIn PDF document text
    • http://bienbao.net/uploads/files/xubunivage.pdfIn PDF document text
    • http://lex.tj/img/file/36012304100.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/79601702374.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/momixebakorobavokiv.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/dabefimowosijovife.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/58646732532.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/43783517475.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/80380049855.pdfIn PDF document text
    • http://newo.ru/files/files/tebenavun.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/31880405972.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef35301490---sunevesokaribu.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/1662027331.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/17616667878.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/sazugizaniwe.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c52b6c781---38066131511.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2a8c2cb61---kijelemovinizeveroje.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/rejalizavuruz.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/34854383295.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/28459012583.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7ca02583c---duwelepa.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_off0000b640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB640 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE52 17504 bytes
SHA-256: ea44e703e07c9b4f6b3bfd849501f96377248c8f3c5737f4a8355534fa91615a
font_02_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 10480 bytes
SHA-256: 20ccb690c4fae1b72f896cac686b08084628a97c254f7aec35c17e26ddee53d2

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