Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4f113c043aa174…

MALICIOUS

PDF

79.4 KB Created: 2021-08-26 17:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 03ff744c4ca7e35fc17534fce8b5af94 SHA-1: 70a4949544ef4e913a6bc060834d2cbd41f7e6b7 SHA-256: 9e4f113c043aa174b695b5c54d9b98be09c333db0f2b5efff7625583b6111e30
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://daonshop.com/files/fckeditor/file/pupexomogifumagenes.pdf In PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071750babdc4---13546320678.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/gajutise.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/55904795619.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gfc47hlj56c5irvmp9oeu7ogh0/46819193113.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc490270d5---kixojugaridik.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/54095827582.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608549fcab1ef---7645509613.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/48174489223.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/98925146226.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/16618754583.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/422019bcc25ccad09fd4c66f0a7f0541/75413498767.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/30607160155.pdfIn PDF document text
    • http://intergeored.com/upload/File/jebevadesex.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b49eb2410e---satad.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e292db61030---dilibupezodowerajam.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a965ceb95e5---ramutunexur.pdfIn PDF document text
    • http://foxhill101.com/userimages/49030009999.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/9701407543.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2a3229dd67dea9430c12c28cf16dcfca/15284181848.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/25427469240.pdfIn PDF document text
    • http://splogservice.ru/content/file/vasojegiwagavorazafajaral.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/u83bceqo28vdauise39eghnvi1/toremageluw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=return+to+work+self+certification+formPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F5 16244 bytes
SHA-256: 7b6810937df1f6d79db0e48d60d36872c47ca612862d7bb3e1d880c9bef58d7e
font_01_sfnt_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FF 10820 bytes
SHA-256: ccb2ac09076bab3beb3ed59d08c329acd81d49daecb5b934c220ee11f94602a6

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