Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc02e3be388d9b9…

MALICIOUS

PDF

75.9 KB Created: 2021-09-25 17:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ef7bf977a9e3dac431248cc606ae4105 SHA-1: 3f883aea429d9e71aad8baa82135f51d50eb51d1 SHA-256: ebc02e3be388d9b92ebe8779074b5302048c01e093be2c5784a417cfeb428cf4
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ketchas.ru/uplcv?utm_term=shadow+fight+3+hack+ios PDF link annotation
    • https://karaari.leaddeehub.com/userfiles/files/lekuzatukupuwafe.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/56049134404.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/pivabuwepuzudawiwexewiv.pdfIn PDF document text
    • http://thegioicamdo.com/upload/files/876839285.pdfIn PDF document text
    • https://hidropomp2008.com/uploads/userfiles/file/xozikejudaru.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/r5he967nlmro832bdvaofeio3p/wapavowerex.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/wizanugulosopad.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/85760750733.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/35723031822.pdfIn PDF document text
    • http://boxethai38.com/upload/file/62349881758.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/8ee37ad03ee4d4511055cb70363161d0/94697895589.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/rorigilisemafekadafezesu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e8679245a---kosanuverazunekop.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/57570709785.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/liviwetegebemezabivoxu.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/22258089075.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/51a27f2af0e7f25f8dabff9bb40c95da/6639431384.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/wixodelak.pdfIn PDF document text
    • http://zaiger.ru/img/file/gemudab.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/21361045273.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c02b083fe---goxosakivutakurutiku.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/88211719883.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161465f4b87b53---turedezegifox.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/45642499924.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_off0000baa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA5 20808 bytes
SHA-256: 6f1dc94e175403e33ee75aeff7a8e390349cefbbeb1d602c2ddd07f4fa983a66
font_01_sfnt_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 10800 bytes
SHA-256: 4845a170021103907fa059a3bad1585a70006c270b7ef7900842f71c74cca4e1
font_02_sfnt_off000109f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1