Malicious PDF — malware analysis report

Static analysis result for SHA-256 0775daebe422a63f…

MALICIOUS

PDF

74.0 KB Created: 2021-07-25 18:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bb13385299480eb3377894da746280ef SHA-1: e3e1e45c19c6ae7d616aafee7ace18084cc6395d SHA-256: 0775daebe422a63f2829b986153eda33819a13027ddf4b68a6ad01832daa3c9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple unknown URLs reinforces the suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7709171a4---nujilo.pdf In PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/5f1c39e7dc6266bbd30d77612aca0dfe/pifebodotiz.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/dunogolije.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/jonufimulusavukotop.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/a287a74e82745170cb8794f16c3e7dff/lonegulojevesado.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/rezokilisudivoguripobinim.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c56b14a73ce---38147135304.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/54150154302.pdfIn PDF document text
    • http://altinay-law.com/images/file/nafavi.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a75304ed011---balupumavuxilusikagunuzaz.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/jutafetemedunotole.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/tugiruviwepufir.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f8361fe87---1995337837.pdfIn PDF document text
    • https://jagominum.com/contents//files/sanofer.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/beliwuj.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/ed2fe06b41a8c3d344b31d0fab2f47ec/gejik.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/kr9q6g0q3nlrbpe1hat8mg3f9e/xiduvugagulilor.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083256637fbd---20473981084.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f86f13729a---makojamaririxizoxurubewi.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/kejoredomuvifu.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607325e82ffa0---83154906554.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/97265483722.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/43563444862.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160805a1ea562f---palamopakenuzapediwarinol.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/54733036444.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9a4318e64---lumurujum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=roblox+naval+warfare+tips+and+tricksPDF link annotation
    • 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_off0000bdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCF 11144 bytes
SHA-256: 38132c14234e26685f04beb5b58e0582ec227128100f206f2305b233acb43ea0
font_01_sfnt_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 16368 bytes
SHA-256: e989525f986b84604e6862d361e3384b08612f96f3f13493e06a5ececcd08403
font_02_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1