Malicious PDF — malware analysis report

Static analysis result for SHA-256 d412802196187dff…

MALICIOUS

PDF

77.6 KB Created: 2021-09-27 20:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bd47bd1bb7043c4e1681f5bc110225ea SHA-1: 315227b4180f549f595977e391773f550929b857 SHA-256: d412802196187dffedfec56ecbbe76ccf2cdfce14faa07a13d07419ca24057ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. One prominent URL, 'https://allytemp.ru/uplcv?utm_term=shadow+fight+2+special+edition+for+free', suggests a lure for free software downloads. The presence of embedded JavaScript further supports its malicious intent, likely to facilitate the download or execution of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=shadow+fight+2+special+edition+for+free PDF link annotation
    • http://bacvietexpress.com/upload/userfiles/files/dajini.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/67637480923.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/fowuwawapof.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ec63454cba---16876421792.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/masutu.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210909132021.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/71466576984.pdfIn PDF document text
    • http://xn--80aaab5bgii0ck.xn--p1ai/ckfinder/userfiles/files/dumijenadomewib.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/17967245396.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/nironovum.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/uqe44dgislbrk7rl41h9eu7rqo/tetow.pdfIn PDF document text
    • https://onlinendttraining.net/files/nufovap.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/16292406298.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/lazubosoragometamut.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/44833018292.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613c39a9121ee---36519741980.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/29196375336.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16142c44486c9d---wokasunawosusuxoluma.pdfIn PDF document text
    • https://shioturboapi4-xyz.com/contents/files/34978098527.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/damepevadokuduw.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/xodisogaxexuvex.pdfIn PDF document text
    • https://angkalaris.com/contents/files/mafotuxamaguj.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f80b246f03d6cf680d73507e1e0f4dac/ginatasizijujagatiroxuted.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC26D 19956 bytes
SHA-256: 43a700efc8e8ce417c5f418b0a942916fa7ee57ff6830ee4beef634644241622
font_01_sfnt_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E62 11180 bytes
SHA-256: da8d4edd15bc0dc384b27d1a6d4be7f5389a3d2c13769e3546fcf47a0719a05c

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