Malicious PDF — malware analysis report

Static analysis result for SHA-256 9247247d2c14b4be…

MALICIOUS

PDF

90.1 KB Created: 2021-06-28 05:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8cbb1d455b37cf5f510f1b3fedb2ff2a SHA-1: 1c4f936fe29d78a1048a51b9b8a48b5a3674fdea SHA-256: 9247247d2c14b4be85976fed2ea7e812e4fcd07c812ac109a39090a20b62317f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a link farm and the use of UTM parameters in one URL indicate an effort to attract users searching for software downloads. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://garglob.ru/uplcv?utm_term=download+autocad+free+2020 PDF link annotation
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/7676063811.pdfIn PDF document text
    • http://santeh.md/img/files/40310769097.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942fff52bfd---42249815327.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a0ff1efe7---datixil.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/8225141386.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/6m8770hqktmk8r6ahilsqe5491/gapafepibemujafulakojosu.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903a2d0ca9d---36934228834.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/60962900549.pdfIn PDF document text
    • https://andrejc.si/files/file/10786201979.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/vesojuvujam.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b79a38f2034---38529937068.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d59038014---35312869109.pdfIn PDF document text
    • http://elitvorota.ru/f/file/14478758458.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/tipazidifokipuwibezijewe.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/57322622557.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/vemj9a18gtnc9j6r4681crosk2/xavawojijabegesofuwo.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608499930ff2d---91450640355.pdfIn PDF document text
    • https://davaocarrental.com/images/file/40042264562.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5554610b07---jewoxi.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e155639c30---62674888935.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0aba703cd552b0891377b7b1778085ba/xenijur.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/biwofazuxa.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_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 30188 bytes
SHA-256: 256fc04cc1eb3ee2706d8be3b69cef869b5bb93700d366ea0d968171d6948625
font_01_sfnt_off000128c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C7 10636 bytes
SHA-256: 0cd261e0eaba092c72747635af71c6666193fa756b5a43fde30ed5aa783a4770
font_02_sfnt_off00014166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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