Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e7e02ac8550de3…

MALICIOUS

PDF

93.5 KB Created: 2021-06-27 16:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5dab42899a37e79a8feb00a65bf7f478 SHA-1: 55e46cedda320c6c812de90e5aecad4a22bcd195 SHA-256: e2e7e02ac8550de3c282be6d2614566267800ce1a1bc9412730f292ae78368c7
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating an attempt to redirect users to potentially malicious websites. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The presence of compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://nsck-cykelmotion.dk/userfiles/file/sowugenibepenosewewixep.pdf In PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/msbrf1hahjkffgr4kjaplm3sv7/fexitu.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/51649552458.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd787e3fd---25691524338.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b73ae8d407d---febasolinavizumojon.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/66585778103.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/1dd215b0041048eba56d14f28d8a438a/210995391.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160949cc5a2cd5---fepovesigitikifawi.pdfIn PDF document text
    • https://medius.sk/userfiles/file/jegijizarinixaxejo.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608799b1aed00---viturizagotogopibuxutato.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba46269f2cec1f39c445257d922254a7/39330405749.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071873694fd3---41237603327.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/lc0kacj07uoh9a0091fpk48fm4/71333707820.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6174e34480---92897906620.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b8fa51054---bajifigif.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/5j1r1bflcu0edq3dm8lcd6o7ig/rikixudidafasisifiwobekuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=freud+on+consciousnessPDF 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
stream_002_off0000ee9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEE9C 18780 bytes
SHA-256: e2b9dc96ba25de333d43f86af62fc1435b23e1be4f6dc9afb903c387eee5db0d
font_01_sfnt_off00010ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 17424 bytes
SHA-256: 2ce078a8ade866e5f4ad0e8527cd950fe680e230604a5ab015a1380c49ae28bf
font_02_sfnt_off00013a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3C 10136 bytes
SHA-256: 85b20ba8e8feb9c1ba2b2dd76ee36b9e99c0af2f86d017f7dc3cc7a56987a80c
font_03_sfnt_off000150ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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