Malicious PDF — malware analysis report

Static analysis result for SHA-256 5383bca748a6e0db…

MALICIOUS

PDF

161.2 KB Created: 2021-06-30 02:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 76a07870390938a495bf900e9546f810 SHA-1: 805b3a02f6f90d1e10d5b847edcf15b4c0ac6da9 SHA-256: 5383bca748a6e0db7705816ca650074557e2fc8eb1ccc5e61fbb6b3176b2e1e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the nature of the links suggests an intent to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/45e215371f06025af56cf682262febfa/82297896705.pdf In PDF document text
    • http://weberstellen.ch/userfiles/file/58663046403.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fe56abb35---78204631935.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5acec6ff1---vojubexubegamuf.pdfIn PDF document text
    • http://vodnik48.ru/content/file/90080010249.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/kebakunani.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8e6c51ff1---kowotikixifilamogog.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/21418304798.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/topaxijadajanopurimawazaf.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/66962418720.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/mebobinavev.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/r77t9pvhmttc1dgrj8hsf231al/32938969224.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf49b19dd6c---wawepatuxabaworujana.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22dd7d0595---nububizu.pdfIn PDF document text
    • http://charivne.info/images/file/33887002007.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/46444900735.pdfIn PDF document text
    • https://shiphangnhanh.net/uploads/image/files/63029468958.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/139f37ab2a06b6bae8aaba937d5ea828/newimotusewamenobukeda.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef787ef311---43804833646.pdfIn PDF document text
    • http://sushi-belovo.ru/files/86859873160.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/folutusubixa.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/5cl8e14e37t7fcmpkfbibgqh12/60905148838.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/36961849584.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/41138388095.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/pazojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=class+8+science+chapter+question+answerPDF link annotation
    • 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_off00021707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21707 17636 bytes
SHA-256: f6d7c070dcbb651c33cea095a8886f419b27568bc6e01af266d65d01bebf74bb
font_01_sfnt_off0002451b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2451B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00025d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25D32 11040 bytes
SHA-256: f3b3a1fc5de3f3a6a6cf73f2a8021b3d7c900f971443b6c21348d6354e234571