Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db6338c0be9ee32…

MALICIOUS

PDF

91.2 KB Created: 2021-08-02 12:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c375807d35b34d0cccace765dd1dcdd5 SHA-1: 508fdbbc0a10bfe5407bd961e752da5bba4e4f56 SHA-256: 1db6338c0be9ee32bf53427917ea067ae293edd1ab0c96f0e36a7c3800656f6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of external URIs and link farm heuristics strongly suggests a social engineering or distribution vector, consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=how+to+make+tnt+explode+in+minecraft+education+edition PDF link annotation
    • http://the100voicesofgospel.de/fichiers/newsletter/file/14879779918.pdfIn PDF document text
    • http://ipllaser.in/uploads/80368388738.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160865d8c59e37---lufojawopujaxebupuk.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/861bcdcb48b0da46e828fcebd4cbad4f/dujupirakobubudifuvugafe.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/21841420321.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bcb8d4f21---titokusafejatoxenosutez.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/40785986937.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/fafetodo.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/6eggasespjtdr43dsh96gunsp8/pazalajar.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/babafesirulowakanej.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/89002347062.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/28436779059.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607308e285aa2---41195735971.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/68769322992.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/pobesasixubizijojafileni.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/nedd6r5qvv8i9pq1vnjo8ke1m2/zaliwomoxib.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9d51c29ff---65269514105.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/46715185936.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/dofemixivijokotiri.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c60be0810---19898539006.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/r8q9c8u8q2g5hd4vjetag63jnb/dulomifajodadenikewa.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/bifotawivuga.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_off0000fc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 18360 bytes
SHA-256: bd6e54f2d5c6affc4f4f68754e4e4695630fe102fadc3914c9a54aca20de6a49
font_01_sfnt_off00012d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001456c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1456C 10984 bytes
SHA-256: 28dbed3c0e8e371215e5bacdf79e51cf6feb5081474e6c2d303d30c28a93989c

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