Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd37fc6e3ea22f0…

MALICIOUS

PDF

91.6 KB Created: 2021-07-30 10:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3db3900ca4c00b6f018bf8d58c5d0066 SHA-1: 0708b00bbc80d438a0b1d52150991bb27b6da7b2 SHA-256: bfd37fc6e3ea22f0b46020a5f141e60b3c08dd7b3bd7742d2d0655c8217aadef
164 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 embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads, suggesting it is used to distribute further malware or redirect users to phishing sites. The presence of embedded JavaScript points to its use in executing malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://cructi.ru/uplcv?utm_term=how+to+get+through+ipad+activation+lock PDF link annotation
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bca6b5b4a20---25260038855.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9804fe6f929fac0e901e24a277cfecbc/96524775504.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/kavokeduwobemojovuri.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/bm58f9ihevunmfhdc8cmg1lb66/sagikuzijuzefikokasej.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c060244348c---wisabid.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/dikekagomazupolevowuxem.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/nuropuxozaduguz.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/39536980677.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/6066665618.pdfIn PDF document text
    • http://sun-eko.eu/files/file/ledajemeg.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/bexivokinutuwobexuwu.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/49e99d14abf950d5eb671f36757aadd5/lataroxibopafogagamoxuvem.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/70961389803.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1623974253.pdfIn PDF document text
    • https://eubeer.vn/uploads/files/38686887911.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df98fbdacf---vodep.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/e9f678b71f9ecd5f8c8bdc13b823d8c9/renogafominibafimu.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f95238694b---88945676055.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd13847b05---34043786025.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/25925872141.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/kuleruzekal.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a527bd7ae60---megulivo.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/3r8slttiq3fp75hk15boitcfm8/15209954284.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a723e853455---dotebixupo.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/mfkoek2cva03aqonp267ob58bs/26233202072.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_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 16888 bytes
SHA-256: e4b1fc73cf2e216d4cc965c535be05eb7e9cfd765fd18c0ed488e880bcfad8cb
font_01_sfnt_off00012e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E37 10960 bytes
SHA-256: 806984baa904d4be1dfe6ec504a35e96f66c88d1b3b54120253b63437b1ea76a
font_02_sfnt_off00014766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14766 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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