Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5d04c038cf384f…

MALICIOUS

PDF

83.0 KB Created: 2021-09-18 00:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ce58053fd9cc331f845d23f4f057d691 SHA-1: dc5f5ed8af036d39bc998acd3003d59133dfb94f SHA-256: 0c5d04c038cf384f5378f2eca321723eb8b3fcb2d7b0f2b8f2b32e914db12238
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or are part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://garglob.ru/uplcv?utm_term=live+soccer+stream+hd PDF link annotation
    • http://sbcnepal.com/images/file/wilexaponowisiginolotoj.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/51139185783.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/65909344717.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/24640280232.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/10483407118.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109180504133371.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/5009997509.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/miwavijonidusebu.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/bijelipadawedib.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/75298542130.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/81874095429.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/66821954449.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/11485737178.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9aeb77510---bonunisilolozidunet.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/favosodemukubewowemes.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f742c22546---64425578585.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/4846337856.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/88affaf643b098ed737fbfc70d49c8c1/danigujusavunavamazi.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/20719755201.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210915105035.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161365e77cb68a---vubopejapazovokalasiwes.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/9981407398.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403202e1b09---fuduxobetozepirakunurobu.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e6f410a6d---3907408050.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_off0000e135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE135 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 10508 bytes
SHA-256: 07ca51195f28a40518e6b5f6ad24811024f8783f767c304e96ae806b72d9f4d1
font_02_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 17476 bytes
SHA-256: 0628b466af7ab803dc9fd5b0e7c338fa0b88ce7ae0e0cb33ad8cafb1a1129489