Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b02224e284ca66…

MALICIOUS

PDF

88.3 KB Created: 2021-07-08 04:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f75d616c2eb4fd8a3416a44e7a298225 SHA-1: ba8ae63e2f6c66aa384ae2ff36a32113536fe40c SHA-256: 40b02224e284ca66c3f3488e5d692e662094d6f9aa9bab723410a14febdf9e1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm hosted on multiple compromised websites, suggesting an attempt to direct users to download content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tonwen.org/userfiles/file/nuvonipovupupetiwiruver.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba839d46453---sosomowinirojifewolofa.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081329605337---walodejefuzerad.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f23e68d19---kulep.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071f64567e64---8223184530.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a986461fae---nivutawavema.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98db38e76---kosemavuxevo.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f1ed6d9c96cf5451fee3d5e3b9b0e6af/konafinilidifuju.pdf
    • http://taxicityplus.ru/userfiles/file/fipabebufepuzajik.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/85ac34e480d155ece78a84f9d89a2b9d/fadaturuvafipamivo.pdf
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/donegeziruvebuvujofelonu.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a18b12072d9---95804535279.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e9f8c6e63---zisobu.pdf
    • https://belhasasecurity.com/userfiles/file/vifajalagitapusa.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074956198f5f---xanemede.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8cd2916f69ea15ed86ed799cde5cd723/mofiwutikilitag.pdf
    • http://vantaibactrungnam.vn/upload/files/xinetigutowozejaked.pdf
    • https://betalinktech.com/blmedia/file/raxopavufawosazisiwimi.pdf
    • http://exoticland.bg/upload/files/files/50519288725.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c6e7966bb---jetodozutokira.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16070a79264e73---95220491737.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8e0847a07---12685193851.pdf
    • http://nedirajtebosnu.net/userfiles/file/bilukozilamasunufi.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702c67316cd---kipixisederulorefabaf.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609523912f0b7---87929148125.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec54ac123---tesuvupowoxulimo.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5420d186621bf3240aba6eba77b2c950/72020164352.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=beauty+plus+download+old+version
    • 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_off0000f46d.bin
188e0e25c9e8b800018ab5575df7a990dff84644febc0519eb683a4266601632		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 10804 bytes
font_01_sfnt_off00010d88.bin
8718ddf53aa02b1fb43c2760f7688dbb367675c30de5a6ad1a018c4b912a09d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D88 17636 bytes
font_02_sfnt_off00013bd9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD9 16792 bytes

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