Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b6d3e5f644ac38…

MALICIOUS

PDF

105.0 KB Created: 2021-06-27 01:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 10c4fc3e24737bca1928fd52dd7c0074 SHA-1: 1b91ad43ca0bcdc2d5f13823f0ab35111a87dfc6 SHA-256: 06b6d3e5f644ac38e8b39933dd27b3603fd8cf25d26e82ba01a685b02fcb2ccf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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://catamma.ru/uplcv?utm_term=call+of+duty+black+ops+2+zombie+map PDF link annotation
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9979f7811fea0a45b563f1e8c7f00dbb/lujiminixedekile.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/lemutawowagifamoloruvag.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081904c8514f---9063549537.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//81392949371.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e72ed608e1---71397625923.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/lusoputalumez.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bc07e36ab00---88119683822.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/41221839858.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/26812520298.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dcf908985---82631061403.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66c52e939f---banafuzenaluxivemiga.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/fosuna.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/8812f58d2926a9dc5f45cf599f53e942/vubajuxefokov.pdfIn PDF document text
    • https://etadelloro.it/images/file/2446737839.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/buvomowupux.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/439d67322e55deb531280bde1fd47629/43616730362.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6em52pj8tg728ovmv7mavtosl0/53038610966.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/sifubuz.pdfIn PDF document text
    • http://smiletoursvietnam.com/ckfinder/userfiles/files/73720028424.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/63231958713.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210529211835080.pdfIn PDF document text
    • http://z500.si/files/xofatasan.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607da845c33eb---47551435435.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/mifubitibisowemapozopo.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fb9fd8a10---97109742460.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c14fd48bcc6---82765909422.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF6 17948 bytes
SHA-256: 578418693f3f4f22d37510f087e6ae50eaa1554975bed45c30a73f3c9430c33c
font_01_sfnt_off00014c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16437 11232 bytes
SHA-256: e36b498d82e4ff53705cd5268d3daaa19f59cea78c2c097dbaaeddfeaa39322f
font_03_sfnt_off00017e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E8D 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58

Open this report in the interactive analyzer, or submit your own file for analysis.