Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92b7f8f6d8cc7ce…

MALICIOUS

PDF

87.2 KB Created: 2021-07-26 16:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5db817d776fd7e3f03bd2cfe61be727b SHA-1: 11877a300ca3f04be7aa6d0f44c0b5475a916dc6 SHA-256: f92b7f8f6d8cc7ce19b4cde5531efdfe8f8953b984ea2b52485540fb571e1895
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised WordPress sites, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that the PDF is likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/b7c5ffb0283eb9afc3651afbaae13e31/2109824528.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c965bdba3a---tiliz.pdf
    • http://grawerlik.pl/userfiles/file/14156720271.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/99th55a9avp10fgmq2krcgnce7/fuxudarovekudevota.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/mbb1ffghuhluspj4t0385nmt24/lukadowobixofopugen.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b8e22270---11862690415.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16070d1d834927---vunamevulamatugew.pdf
    • http://driscollandgibson.com/images/edit_images/file/puxonuwudefawaga.pdf
    • https://pottoka.info/files/galeria/files/zuraguviruluji.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430110807342019.pdf
    • http://aldo-ins.com/userfiles/file/juxoginefofal.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8b630538b---kajepitemosi.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/cf65bdb180712c499ea1b0cdc67e1aa2/62947121171.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef05dc8c9b---gegetujazolapigemod.pdf
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/43729708663.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0a77c3e7---43871983435.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/6ac52baae5ea84c40a06c13d614cf1ee/rifikunovosolawabuvebezum.pdf
    • http://hzqzg.com/d/files/rujofexo.pdf
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/sesuluwudologepafevuza.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/5g040itmgf9glk62j0hrpondld/sagev.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/164d85986cf47cee46a1ad0185efa6a8/gujovovizexugepitotane.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/a86a2673a9979fc9e052515f58f71c56/maputubaron.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b2786c35a557a63259351838472af0db/48792502153.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63c518f4b0---53423768799.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac40fec3988---jomededunezav.pdf
    • http://jiangsutravel.kr/userfiles/files/20210709_213629.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=can+you+still+get+warpaint+and+rose+team+leader
    • 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_off0000ee92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 16792 bytes
font_01_sfnt_off000106a9.bin
4c6dae7f1678a4987e74f00e38f64b5cff1bc69070052574e5338a6dc6efa4f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x106A9 11064 bytes
font_02_sfnt_off0001205b.bin
1ab434eb67d2177368946444aa51e4212510da2233c93822688a96aac0832742
pdf-font-stream PDF embedded font (sfnt) at offset 0x1205B 17604 bytes