Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d30f4e6dd62a754…

MALICIOUS

PDF

87.8 KB Created: 2021-06-28 04:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91e7440e52af93ea005b21aa34e220de SHA-1: f0408471102462a8140aed2ac3b264c5db8586bf SHA-256: 6d30f4e6dd62a754866c88442d10e732ffd982a8bfcdc0a8a5c960cff04039d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://psychologgia.pl/Upload/file/78626135422.pdf
    • https://likeevent.it/writable/public/userfiles/file/papozenajunavitasabep.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f72b364e0---mapis.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e57607474---ruxawila.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d34b169b51---45861139962.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/800e096d86a82aa528bb81e2f25fc31c/21845534686.pdf
    • https://rajatotogroup1.com/contents//files/zunidevapipijazol.pdf
    • http://infinity-pro.ru/userfiles/file/53681369605.pdf
    • http://seabeachthailand.com/UserFiles/file/932605698.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ugt2qjnge32vdgdlfgo6543gs/kusutigutamujamejut.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/04b2f3e91bd4ade2f8e013072e9d090c/gufawufemaredebakovesen.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/e6b24c04908d8c29fd14a3a2fd4aee0a/mararalivevujelemunu.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a054b945525---38866320827.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/0551d1d7276ca6fcc7f378033bba1c47/jedisezeriwotege.pdf
    • http://xn--80aikni6a0b.xn--p1ai/images/file/78598590079.pdf
    • http://fxmeat.com/upload/file/190401a506dd81ada4db2d32b87713ee.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b6671cbe745600480632bdffcf1ef59b/nulodepiba.pdf
    • http://angelcabrera.com/FCKfiles/file/85602184738.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779a6a074e9---mipedatubobazibeleme.pdf
    • http://celcg.pl/uploaded/file/67596983031.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/4c1e140d7059496f6c762f3abac8a15b/datimotakuxepux.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750c0c3fc65---gezesipoduzojunal.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/roboxek.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af75c28e72e---gorebowasurobuwada.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/529d32a6304b30f1f27e2b2414e51291/dapelawitifi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=lilo+and+stitch+frenchfry
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f51e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 16792 bytes
font_01_sfnt_off00010d30.bin
ba4ca1262d684eb853e1d92cdc7322fdafe1ef7d27d4c93807a74cb7dacdb6e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D30 17228 bytes
font_02_sfnt_off000139c6.bin
3f5b7bb871d2b462bd577a0f215dea8f6530718c9268ddc90ebf2d6bb51d13f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C6 10644 bytes