Malicious PDF — malware analysis report

Static analysis result for SHA-256 566e9dfcb5a1618f…

MALICIOUS

PDF

101.7 KB Created: 2021-08-03 13:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 883133c60bb3685532cb23c4e51b4179 SHA-1: 15748d4542f12dff6b05a0faabd8f422d85dab85 SHA-256: 566e9dfcb5a1618f47dbe6de9e4a48a533a12389139ab9a0ca52e0d0d6fe2855
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing lure or a downloader for further payloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://inwebjor.ru/uplcv?utm_term=groove+onn+wireless+earbuds+instructions PDF link annotation
    • http://akcjonariusz.com/UserFiles/file/tujirodifemulabeje.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac67e655bcf---pilinata.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da63952b1f3---lepopofifanovisodog.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/b9858a0f57e4b929936d7cf8cbbf5304/latarariguwojoduxo.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/penozomokaro.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093f3b047dde---jokabeveza.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16094843b78e85---jonesuxugibiposufi.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/36720830585.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/jo2rkpenvkjvc11de57157q7c6/maloxesoter.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/kobojuvetipobexofaweverip.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609070fda7dcc---12432197213.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bd74cde42---lasulubupa.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/31962891257.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/gixatasure.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/tazilufojojinopelipef.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/5m83tlmrnipfstnsrgk3h0j98r/98799549977.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/zonijamunorozisewikivero.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/riwixivodiluwesubozatepin.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/ruvazepozi.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fc2f5bf2c---wotukanen.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1f4dec1c6---18787105649.pdfIn PDF document text
    • http://seamacros.com/upload/file/kuzupabo.pdfIn PDF document text
    • http://halmar.info/userfiles/file/46487818690.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097954e40f7f---popabukopaxepema.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/c2u9cndbrvggr07r1be37f90jh/nebidasukijasosazokosomul.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB38 18544 bytes
SHA-256: c62abfe37517d8b0c5241f6a929fba983cf087bc89263e19bb0b138fbf85ba62
font_01_sfnt_off000114f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D05 20344 bytes
SHA-256: 7c777010518197832a55ce5e1bf4279cc71c68c7205b6d1d8f27fbe59c6047f9
font_03_sfnt_off000162e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162E9 10796 bytes
SHA-256: 1a7f83026322996205955a5c31252aa0ab33736257dd9d18cd63427fd129236f
font_04_sfnt_off00017bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BF5 2324 bytes
SHA-256: a2040d5e155689b79fe0dc09596ab11873ec1db088ea49be35ffb74a518d8467

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