Malicious PDF — malware analysis report

Static analysis result for SHA-256 f001e5d39c99fbdd…

MALICIOUS

PDF

127.7 KB Created: 2021-08-13 02:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 70c8ae88a773156d73c524e490535f00 SHA-1: 3c790e3239a2bf86e0ef7f55178b34d5d8085f7b SHA-256: f001e5d39c99fbddd109f0c292d43bf33c4468c00699db876d37e86154b0b760
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The heuristic 'SE_QR_LURE' also suggests a potential QR code redirection, further supporting the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://caramelitos.sk/files/7696269533.pdf In PDF document text
    • http://mrmax.ca/clients/9797/File/2954502687.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe8f1dc4fd---didebudetoz.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093a1b387a15---54239514313.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/rixexixivowebobapefaz.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/19965353476.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/55776109246.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210713_183031.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/81617485608.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/kirisegudemik.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/dafibugotitilev.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/jiduduvusikinuxixew.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/zajemamiwitukipineji.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/zezuzavigamezasizigikota.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d9ab6496dee3252e77aefa1b386d90f7/fotepe.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098564e7d79a---voduxerikefubijuvulivid.pdfIn PDF document text
    • https://austarpharma.com/upload/files/86108540266.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/91823503771.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ca254cef5---98227920370.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/poxubisuka.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/lijutaruv.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce612da4fb---ropeme.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/14537480701.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/tizupunekaluwitujamixali.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=40%2F60+condominium+winners+list+2019+2+bedroomPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17197 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000189a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189A9 25368 bytes
SHA-256: 92f68331a13b4754e4b57b26f2a967c0ac4f6af02133077cab11f362c5d163a5
font_02_sfnt_off0001cb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB7C 11340 bytes
SHA-256: 088e4377825ff3a0cbd8b24885a59f4c94fcc5005f37ce866fa4d54a80e8386a
font_03_sfnt_off0001e642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E642 2108 bytes
SHA-256: 98e83d8652f400d7017528072aba957a169e635ea274febdd6ffc9717488a13f

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