Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b46972f116e83ae…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 08:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 965bf566ac0c6ad207b7f9732fc9b8e0 SHA-1: 5c58ba7547087863f061236a3743cdd280d54ffb SHA-256: 3b46972f116e83ae67bd610d5ae6dbb89d79bf9368e878c01ec9638046dc39e3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, likely serving as a link farm to distribute further malicious content. The ML classifier strongly indicates maliciousness, and the presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics confirms the intent to host and link to malicious files. No scripts were extracted, but the overall structure points to a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/f3ied2cass08uki368bjp701g3/migufebanefifiseko.pdf In PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/bc823675cb43d7a7a3fd6f8155cc5add/fuxapalodonurazivudamu.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/38357dffdd686792b164de00730167d5/67405751334.pdfIn PDF document text
    • http://belst.by/upload/file/kelezurijolevoxavas.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882a9d72eb1---murul.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a15aab6ab1e---71877189354.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/96t91oab71php506fb6sio09a3/timelofada.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76dd1936f0---79661621761.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/fusimujajotarawop.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/51350542854.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/javaderikazemagakisizen.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b968d35e8c6---63636623555.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/kokivusizujubulef.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/sdu29amk4buioqeeui3hfsapn4/25499192164.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43ca50d5d---83543924268.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/sisixigijanujulivuzunu.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/tsdmj1um4nb3nr8tog90hfq8p1/wukapomepamimunobelo.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210516015553_2ktvne.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/885293babe312e90d8c2877d331efa13/wofogudakej.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf200d5cf3---ropiwuko.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/67972692276.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/23795918106.pdfIn PDF document text
    • https://artbynela.com/uploads/file/45450229183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=iron+man+3+movie+download+in+tamilPDF 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_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 17380 bytes
SHA-256: 6a4698521ae4703d653554c554031250dc1e9aaca33c581bf47c446606e50afc
font_01_sfnt_off00011f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A9 10516 bytes
SHA-256: 8ad908a29623297a22ddc97a4028d43b7e0c2f50308a2509e5003de69eb676f2