Malicious PDF — malware analysis report

Static analysis result for SHA-256 9594b1bf2f48389b…

MALICIOUS

PDF

91.0 KB Created: 2021-07-07 06:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 798fae443b8c7daada8695ab68203bde SHA-1: eb083a14009d7aae9158b62aa7356e5802e931d1 SHA-256: 9594b1bf2f48389b5ee4b2070012ca4ee8bd31736cd576805b1f416a51d040d5
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised websites, many of which are hosted on disposable domains or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded URLs are designed to lure users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16097b9e429b0e---4576365938.pdf
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/nosinirimiwofewalabiwasaf.pdf
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/mutipadagomuk.pdf
    • https://footballsod.com/images/ck-uploads/files/lerilonekodonax.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/05d4062a065e7f1df71168dce32baaea/pusokenugejezagarumora.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080e6e3c2fcb---8763917675.pdf
    • http://cdmatik.com/uploads/file/15506991017.pdf
    • http://www.annaleehuber.com/content_files/file/9716866221.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/dnmsdf8m3kveti73ksd3s69j43/kuxuvodomozosije.pdf
    • http://mamnonlittlesun.com/upload/files/tirunebawomavufet.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160987d1d96d97---lopozo.pdf
    • http://metabolit-plus.ru/files/file/xoranomiko.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160952ef574e23---mizodedonasefexav.pdf
    • https://muzeumkonstancina.pl/attachments/file/jijexavafivawupuno.pdf
    • https://esprimagroup.com/userfiles/file/lalejadobuk.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/tibuwejot.pdf
    • https://klairtransport.com/uploads/files/57734009201.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/d031b67d237095f9b26a0f4c858f90bd/veripud.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/062efe6c551ed5bc8a74b759b2106820/dobufogigu.pdf
    • http://kondicionery-fryazino.ru/upload_picture/file/ramubipidifalamazoxe.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e76b3df49---sakaluwisukiwu.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7b443aa9f---94022205989.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/817rcui8ukh6rj8d47pug2vlb6/ziropenoro.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=highly+sensitive+person+treatment
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc6.bin
a9e61729f64e93f3c8e05a26001e88f7654263facbc9a840ed29a6b121704549
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC6 10872 bytes
font_01_sfnt_off000116ab.bin
df3d4b24f16857aa66add7b16b9559c84555da10a510afccfcaa938c4bacbf94
pdf-font-stream PDF embedded font (sfnt) at offset 0x116AB 17796 bytes
font_02_sfnt_off0001450b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1450B 16792 bytes