Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b8ff1bcdd8f2e3…

MALICIOUS

PDF

90.5 KB Created: 2021-06-26 07:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 702af4a206f2d381e50d978c7d558925 SHA-1: dccd55e12edbb95ef96370ca719e7575d2ce90ca SHA-256: 38b8ff1bcdd8f2e3489169852e902e5c89e3e5a6ccc8f9f0381755b55610ca26
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://philabc.ru/uplcv?utm_term=derive+the+third+equation+of+motion+graphically PDF link annotation
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/13352067748.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/47664356043.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/cl4iahhmskkq5fqsor627i7k7f/jutikupiwilixawepuke.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/7673407788.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/a4aa484b458f1ac0aa3cc12af38cddf0/22750276136.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fb9a31706---61904750927.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0eaquthfnrl4pta6vobslfhpm2/nupovubakix.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40513788914.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/9222f9f8cc0724590829156c47898ad6/girulelosilulobozutusig.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/4531617317.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/59657280776.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b13cfd88239---99035081299.pdfIn PDF document text
    • https://airbays.com/userfiles/file/nujitixeguweboluvo.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1f190637852dec319d8e3761e1cbfb88/gojofu.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/e48f7664c1270dca8d2beef639e650f0/54778964086.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16077ecdbf3538---rivoroxuwupomezasaki.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/1183a3j9ecgacp959gahu1moh0/muxanunalonubisavaviriz.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/kijegakopef.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0194700e48d09093599d944ac4cc3af2/japamukegixeloj.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/bd93b3e0c49cb6641c5c94e066776d8c/fativom.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/vetir.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608df7cd6f0f1---83414591226.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/89718191458.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F8 11328 bytes
SHA-256: dc9ffd302ddfd469ba781ad6ed1fc8b2fe5a9f38cf06436937d36a7cca0d179e
font_01_sfnt_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 17632 bytes
SHA-256: 160a306f2645ccacf82261a0da26a7235be3a5e46a34f051d39095fdc9d6841c
font_02_sfnt_off00012e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E30 16144 bytes
SHA-256: 5f2a87ed485690ae99dd00ffd3dad57dcaf6de75c4981ecbeeee12bb760f3f7c
font_03_sfnt_off0001438d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.