Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e2c9a54a558370…

MALICIOUS

PDF

114.0 KB Created: 2021-07-03 21:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5c16b7141865b302c8e17f16ee19b38e SHA-1: e4ccd788890c02a6067702bf1beac2e17fe298a7 SHA-256: 15e2c9a54a558370e7350e12713b640551378c532c784dde3533cfc3b7736cac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as a link farm, with many embedded URLs pointing to compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing or trojan. The primary function appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • 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.
  • 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://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/db81a6f3481463971c33e1f3fc05efda/kuvezikixavamiwu.pdf In PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/5fca80789d06472dcbf268868424ac81/99085335688.pdfIn PDF document text
    • http://cohensevents.com/clients/74638/File/37080955347.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e168f395a9.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0859047001620101157.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/017ca5ba698420f7c79119c645af9c64/loxoratimuw.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/jovamutu.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4b0afec9---9682902166.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/gl7itiefgfbfkvkg16pb0en3af/jotid.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/zodinobiwimidediz.pdfIn PDF document text
    • http://3q1p.com/upload/file/210702215657882751vhvjgumkrou5.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c1ce0bf67---60006002355.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/d4schqad95jgakcvmctf876emr/rujasimaparurapuwafom.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/89078061384c1e4507c02a89ba2fc260/deminubiranu.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1f2e58803---pimowobewu.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607946aad5c1b---pijap.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/97106522922.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/492625b6228c1938a49590195a356154/63097951054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=text+drawings+to+copy+and+pastePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 25612 bytes
SHA-256: 9a1334a2830a1ce54798ea9c07226e349694f9697b417579ef0f7f1cb8a72483
font_01_sfnt_off00014de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165FA 17036 bytes
SHA-256: 1cbfc7ecf1fac0d95b1ba715dcd27fef48d65dba728f69630a1bf8febb778f50
font_03_sfnt_off00017e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E7F 3736 bytes
SHA-256: b383ed1db7fe255d7647ab11e29b7b9d43b503cbd9250d3624417b971a00331f
font_04_sfnt_off00018dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DDE 10908 bytes
SHA-256: 971a89192e7593c4c5fe98f1e9d4f7a0de5b9bd76f884157cc8185a570fcf0bf
font_05_sfnt_off0001a726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A726 8952 bytes
SHA-256: 084aba20f45b3af06b7ac479f9c47f2f4f04d28e681e3ec8c8cf5ce34a72f99a

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