Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c969e04aec252c4…

MALICIOUS

PDF

89.0 KB Created: 2021-08-08 10:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d38d5d62b631c532d337c53dd47625c1 SHA-1: 16ecc6132faa4b5823d378d9b705fc3da212d39a SHA-256: 0c969e04aec252c4c1e549983f788e401d16370e2eb5eb8f15f5736bb5123d90
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating it likely serves as a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that point to external resources, including compromised CMS upload directories. The presence of these links suggests an attempt to redirect users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://tc-antey.ru/uploads/files/luwilasudotajesemejote.pdf In PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/89130582402.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25d5e8fa8b---totepoxadafakabixupenejal.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f7deef716b5---71379775117.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/nazolobowozudajuvoza.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088654495359---xosewobosajebemazijo.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/18701106511.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210515/file/77283748851.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607576eed5cec---59520834262.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/7e9f6a6656bac32691b0242dafbe8811/603050993.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/04f84fa1bd05cae2281aebd9fb09bcb6/nefirogapeduki.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/lelizabosa.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d183cb411c---nukoresisoxukebonudezoda.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079160f3293f---nirudalipebofez.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/gegasapusetimojeketi.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076dd871072f---29255505964.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210728_CA707807A0513C1C.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210724082140_3o7ru9.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2c96d4572---41308718767.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/a8fb0f6b4bc847b9f725dacbeb392278/miwalixakisiju.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/pagepaboniv.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/zawiwirobidebulerekedokuw.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21c4793ae---kiretasapusotedidipudove.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/89557874891.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/21178466432.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/4316421101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=all+dragon+ball+z+games+for+pspPDF link annotation
    • https://www.youtube.com/watch?v=U9rW2l9OIRw&t=58sIn 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
    • https://www.youtube.com/watch?v=U9rW2l9OIRw&t=58sIn 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_off0000f84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 10832 bytes
SHA-256: 7f91b33ccdd62c7f22d69fba8b898e028c951a6e0766244359a110b41844a807
font_02_sfnt_off000128f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 17116 bytes
SHA-256: 60c0c8bb3e279662b9967303bf8d8d2bad6689c7220dcb620966300b75bcef3d