Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c250478003b94f5…

MALICIOUS

PDF

108.7 KB Created: 2021-07-31 08:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bb333b2468df9c4cabab35cd35e04d63 SHA-1: 7d2d05fffa30a9a8dc7b3b1d235780dd1f51712d SHA-256: 6c250478003b94f502968a8a8219d6ecfb26fd322ea736ac24a3ac4810a0afe6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The presence of these links suggests an intent to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://wastran.ru/uplcv?utm_term=harry+potter+creature+inheritance+fanfiction+multiple+mates PDF link annotation
    • http://bhhangkhong.com/upload/images/files/manasikix.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/62890221631.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/4de98875831ee45d5ea7c77b68878ab5/21847858099.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073bb63ab7ce---94397013650.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/41509702258.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/61479781623.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d5277e73d---24660123846.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa103dadec---84887119327.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160835c625d402---xonov.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/dobunedalijagipudibib.pdfIn PDF document text
    • http://goref.ru/files/file/57202144148.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/36989467641.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/35390131775.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/24120684246.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/55139984260.pdfIn PDF document text
    • https://master-service.ro/images/file/vabutapegasiremujugolo.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/fetugugupenisixamotagix.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbb108fb1---67637998396.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/4rd98k23vresuai9saem668nj5/13523718444.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/4nqkhmdnrjvvghtha7sb6m34nk/navezufivabiwavumawu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/8894c0b2317664945183b32143daa1df/ridelofavamazazoxilobem.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161049c64d91a6---vasusawigelulex.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/vifibedekovatuz.pdfIn PDF document text
    • https://pabrikangka.com/contents//files/tibavipujifo.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000159b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159B9 18884 bytes
SHA-256: 8a26cd8891c9812b3e11f43134c8424c3dedd04a3ef49cc150f47bc8c33b5661
font_02_sfnt_off00018af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AF7 10948 bytes
SHA-256: 04fb2ab2d7f9dfd2362a6ace562b54933d0ecb0774de8bb6f3c6ef3a37577b99

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