Malicious PDF — malware analysis report

Static analysis result for SHA-256 02454e96d1037be8…

MALICIOUS

PDF

97.5 KB Created: 2021-07-01 20:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8b8e6e655359bbced33099a266f5b6b SHA-1: b2b1180f95cc2556c13da24e9f0c358107ef8e63 SHA-256: 02454e96d1037be8721bbe140c51a5772db7d141b318676e5e58d75bdb0854a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of multiple external URIs and a link farm pattern strongly suggests an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://ckmusicdesign.nl/userfiles/file/51366178500.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/d2c4a61d02dd39996d132db0f7d4a63b/37393053938.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/13861024055.pdf
    • http://hongdacable.com/d/files/10265033619.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/83dc00cfdae8fccc6ab2f6409528f084/59907663061.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/d389d8970980379eff44ad37aee10e03/5011931188.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6742016e2---kadifawujegupuk.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcc803ac07---tasugizasegewejederel.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075aad6e7c8c---51372888355.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f143ba0dac---35455780640.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/980dab8206637a5a9f12e67b79f58845/damebuwar.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc610481564---zuxazazejunefanetis.pdf
    • https://12shio2.com/contents//files/jukinalapu.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/dmrqulhckbdsn2al3ae6e19pm3/xobale.pdf
    • http://ozari-ua.com/files/file/tisurejilujikat.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859c5eaa59d---57255102471.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a84e2b7ef43---toralogolitufosadara.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/c9ce062b343c7c26a9be455e2a6d634e/robujigegosis.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/f7fe14f5ab2f00ab95ecb502d55ff320/25257925448.pdf
    • http://archimax.ch/dynamic-images/cms/file/55752148828.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9bd500925---48471374516.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/cmb867so61fibfu54cdenk4m8n/38692286122.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/0cbjmt71gmn2tc4o3n3v2vd386/54562597758.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/zalufoled.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6f6441a2b---92785118287.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=average+rate+of+change+formula+calculus
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fee6.bin
441565be2066573376df748873dd77a66fca151c710efd11a1b9bbc530b6a705
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE6 10840 bytes
font_01_sfnt_off000117cd.bin
450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x117CD 16088 bytes
font_02_sfnt_off00012cfe.bin
4b6f2c0dc750fa92aeecc3c900e95b9c20789b58cae0368dc1e428b82e73c863
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFE 19316 bytes
font_03_sfnt_off00015fed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15FED 16792 bytes