Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d2392372aaf2fd…

MALICIOUS

PDF

93.9 KB Created: 2021-08-10 06:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ef7e27b82905fae9b9ccfd1933807955 SHA-1: f279189a7e4bab43c50828d6cee1cbb95baef610 SHA-256: 67d2392372aaf2fd4f092e2587c40ed12a0e8a4aac00f519c44aa331fe4cdff6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports malicious intent. The embedded URLs, particularly those related to 'formcraft' plugin uploads, indicate a pattern of hosting malicious files on compromised web servers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b5089ab910e---vawigojirujogetosasa.pdf In PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/9b4206b4c471eb9a09fadfed46c5df7b/87789422696.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/24589246178.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b01253b48cc---puzelubiv.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/44987310450.pdfIn PDF document text
    • http://ecole.ru/text/images/file/24759710167.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e62f998afbe778225ed18de40f85ea7d/886975667.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/gaxitefovukebazasotazamo.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/11691941847.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/notubeb.pdfIn PDF document text
    • https://termofriz.rs//files/1818534194.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/mesunatumubujobedonilum.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/gewopovarajemixelimiku.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2297e827196c2a964a1cb9ac0ddf146e/3323362059.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3d035a2db---dizosuseda.pdfIn PDF document text
    • http://mopron.ru/upload/files/9913013790.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/74901702702.pdfIn PDF document text
    • https://eamenfaraz.com/cache/fck_files/file/48404968509.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/50917344284.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210604054556082.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d4f8d5dff---20843155942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=download+bully+lite+200mb+android+apk+dataPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 17656 bytes
SHA-256: f0e7ba393e42ed39fb02d5929506f001a736f4da67846295a7801a6c2b0f67e9
font_01_sfnt_off000117d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FED 11160 bytes
SHA-256: 1112605b1df3b24b9c968243eb17ed1acff85667f00b80b183e95823fafa78cb
font_03_sfnt_off000149cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CD 1732 bytes
SHA-256: 5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
font_04_sfnt_off000151fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151FC 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46

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