Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f112552f12ebdc…

MALICIOUS

PDF

114.5 KB Created: 2021-08-12 18:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 1aba2c42d1a14661aea3cf6599b4b28a SHA-1: 6cea877163db506c47c29156691d4ef072d18be4 SHA-256: a4f112552f12ebdcf5683ba7b001188af13323ab6cfc7e46a293994d99e7239e
222 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=how+to+play+age+of+empires+2+definitive+edition+multiplayer In PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/nekelubekukoduzeju.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c20424d2a96---jorotoselejatifadiz.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1627407404.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bd2e59a3ca466c6b12bfaeed3372b22f/50907748536.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/74585916444.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/26522000406.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/51382351227.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/zenuzowotinezofe.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/zalusisigakofo.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/32965269212.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/51346314726.pdfIn PDF document text
    • http://lovellreunion.com/clients/4/42/420738e4954c29d3cfd02fdb1bc9139f/File/sifibomuxovemuv.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/lerupegejefuxuz.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f37ed593008145870fbf40b534f540f/xuxesakewororidifoxupajuk.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/1bef688bfdbdb32280b26514a8200d4f/xezexagegixiwinekuwunax.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/1e24fced1f13f95799f264996a18bf5a/15103190851.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608376b39d6db---wufadekajutetodekibobix.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8234ddaaf2---javabixosazaxixemesobob.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/53286633746.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 extracted file (font_00_sfnt_off00014c21.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00014c21.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C21 18832 bytes
SHA-256: 3751c9df503d65020e9481fc433082dda2495ba5c18b3da248443210fd0276df
font_01_sfnt_off00017ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CA2 11320 bytes
SHA-256: 3896a07673fb29de25ce44a7dbd613d3a72b39ff762f3ed2d37f80f781f330ae
font_02_sfnt_off00019727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19727 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001af34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF34 2972 bytes
SHA-256: a62930e677de37a00f916f430d407a8fcfb2239ca14d713434c98f62efd1ad37