Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d0812c47d67ad7…

MALICIOUS

PDF

80.4 KB Created: 2021-07-05 07:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60b101220506b6dde9f1769448877ca8 SHA-1: 6a01c35f2a068b6a70fb7933cf3b2b6b90e6f4c5 SHA-256: f9d0812c47d67ad7daa5a1cadf1e318c232e7a6304ce4667d2f26314a02fad23
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on potentially compromised or disposable domains, indicating a link farm designed to redirect users. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent, likely phishing or malware delivery. The ML classifier and ClamAV detection further confirm its malicious nature, pointing towards a trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://0930actress.com/files/files/xototatuvumikedisugodu.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/50137388220.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202151481758518.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/30851fb13d05b9d3f0a4ade69d0fb21f/9364436883.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b670049da48---kaxejutuxatikawiki.pdf
    • http://shsclassof1970.org/clients/872719/File/65903484369.pdf
    • https://vegan-eshop.cz/data/file/xijijoxedaxaku.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f55389d274---31085369132.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/soridelojurobatoniwevid.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0387d12cc12abf06b71ff912417f37ba/40927010034.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607495839ec8b---44007052174.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/4576ef4a18f4815da7977bcf99a236e7/wanezetup.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dff0f89b650---towabujarosagozitusokopa.pdf
    • http://jnnycc.org/userfiles/file/piragigex.pdf
    • https://sambelteri.com/contents//files/vovuboxigi.pdf
    • https://aslimitada.com/userfiles/file/8305983985.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/jq5o41ps9hfskabgpbipkel0i0/kesunukodupovodutovawuz.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0c2158c40---kimaxamuko.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d858b18850---23003802910.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2c80d6e8a877764cb72cad3574c61084/84899912945.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16082e77b4e5c5---kufojedibegijixomipilav.pdf
    • http://amblesidewindermere.ca/fckuploads/images/file/73202984702.pdf
    • http://fairway.cc/images/blog//file/tasositomugesusexidule.pdf
    • http://amuseonline.com/absite/userfiles/file/26226295368.pdf
    • https://anukulagrotech.com/userfiles/file/82205426308.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=950+dollars+in+rupees
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B3 16792 bytes
font_01_sfnt_off0000eec5.bin
0a48ebad5b687577f6743e2768980aafc50bad7fd2eb9a03d635a89c285fd676
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 17216 bytes
font_02_sfnt_off00011ba0.bin
3b797b7b78ca7a6733b1c79b2a8cb9ee1fd4ff9b87f28b87dc403b17db494749
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA0 10716 bytes