Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae422b61a9386cf9…

MALICIOUS

PDF

83.5 KB Created: 2021-06-26 22:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 190ba6961f5d265ebeb05bb2b109198b SHA-1: 382b207b8c5cfd6ebdeda4656355a977f7764536 SHA-256: ae422b61a9386cf973354ee3c96a7434b6ee39e1a3f0d0aee2550d23b760f899
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of link farms and the use of compromised hosting suggest an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755a89b5f90---65504622735.pdf In PDF document text
    • https://drrajanmahtani.com/userfiles/files/85490407774.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/92333b3d2b65eed38305d64003bcd9fd/sofipimupaxano.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/udalexab.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/96002645838.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/bidiwupomow.pdfIn PDF document text
    • http://skikk.be/app/webroot/files/userfiles/files/50663346982.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38008aa96---43197724605.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210611131751239.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160946a2351566---4640158777.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/vesitube.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/5c8e429b6f80113a2ad03bbb0abdb1ba/rudifevakivil.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/18322327078.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/kibalojebose.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/0po2g9qpi90qkq2di2lnfmdl55/guguzowa.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/1ff88762f7fad96aa00f6138faaca875/92312762564.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f8388000f743282ca25d4ccefb3c9e17/kidogudebababap.pdfIn PDF document text
    • https://aneri12.eu/res/file/xiverapavamewopi.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/4b665e14ff9c9112408fc0edb1ef8eb1/47605281365.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=average+rainfall+in+the+deciduous+forestPDF 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_off0000e311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE311 10900 bytes
SHA-256: 67661b3c18db825dcbd22891195d6cd06904373daacd1668ce90b1c641c3fe98
font_01_sfnt_off0000fc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 16536 bytes
SHA-256: aa8e372d2b777cc6a7651456a15c9506beb16466e82b070c47b8fa5f581ada2f
font_02_sfnt_off000126e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1