Malicious PDF — malware analysis report

Static analysis result for SHA-256 3126f2a75375109c…

MALICIOUS

PDF

96.3 KB Created: 2021-06-30 13:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 754d2b6b8d247c20d9d013dab5fd20b0 SHA-1: 9b85f4e220779052f2f91ba5f3b6385b5d4c0b05 SHA-256: 3126f2a75375109c95acea60e6f938cb3c5c5e09618ba6cee41e0b353a8d7e0a
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier strongly indicates maliciousness, and the structure suggests a link farm designed to redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/5cf61dbd6dd6b5f917aef7464f31101d/refegomegasuvazefo.pdf In PDF document text
    • https://hgb.se/filer/file/80340030329.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/dafosefuti.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/jezekabuwolewerijoj.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ccc66ad80---sosodalipovu.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/ruvulelukikonapogogimi.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/t9bk3dhom79msv07kqgphmgrj0/duminewu.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/66935259793.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a714a740776---99393987368.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f67a4448a---36962924340.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07059a88b2---befezikovop.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad10fc19e8e---84133087532.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c518bb308d6---jewobumozutigepukudunudi.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae6808e5c---50425300613.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/50369100231.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a21b82efa76---rajipij.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/f1ej55ufkvrimfhurpghfjvbgd/rubizapabefilajew.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3b2vh5va5vl18f0s37g8nt74hj/47556187985.pdfIn PDF document text
    • http://vantaibactrungnam.vn/upload/files/53431837647.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/68f885c7800449d67d39d1a1846e4603/91250145216.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/706edfc05bb06e8b5a6402be934b9e63/moxuvosikagebalowoganifet.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/9a61ac703d116fac5a43f69d97466341/9909739736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=guardianship+without+going+to+courtPDF 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_off00011328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11328 18560 bytes
SHA-256: c2d0866daac30495c2321c1e527293626e52cd30592102691fc884a91f8b472e
font_01_sfnt_off0001432b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B42 10840 bytes
SHA-256: bc22ac38c1944f7badd0b0af57ead38d9eccc0983c2ae66468a73a259819decf

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