Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b1392fd87e202db…

MALICIOUS

PDF

86.2 KB Created: 2021-09-05 02:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d8050dec544505fd3f7618f1b91d6917 SHA-1: 254e3dbaf7c365378d8725e35c0f3d895818568c SHA-256: 5b1392fd87e202db86fe589184b5324e8bc4069265d21e6647cdb2cfd7c3aedc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ClamAV as a phishing trojan. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious payloads. The numerous embedded URLs, many hosted on compromised or disposable domains, suggest a link farm designed to redirect users to malicious content or download further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://gesgo.de/userfiles/file/dikigaf.pdf In PDF document text
    • http://ginzaoakland.com/uploads/files/divenutikoloruweliligijak.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/fadoror.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/8660022876.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/71059667902.pdfIn PDF document text
    • https://paradigma.bg/uf/file/64823646563.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/26736924539.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a6c43af6793fd34d1a277fe503f2dd45/63776532113.pdfIn PDF document text
    • https://ottopianos.nl/files/kewebojapujagum.pdfIn PDF document text
    • http://melvin.cz/data/doreduxokedejo.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/4ea5a620935dfa87b7712b9a973f47aa/92957452067.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/vufifubesavamatovof.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/waxofozidavin.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/jusur.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/vasolivevojijekerovera.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/af630bca957feccb3f50b992e18a41c7/beseruwoxorelofidafevukew.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16133e890d49e5---logupadotadifazer.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/11287005889.pdfIn PDF document text
    • http://snsi.jp/image/news_file/65546647000.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb9dc76e9d---pesiwulozosipapu.pdfIn PDF document text
    • http://violetstudio.in/userfiles/file/vugig.pdfIn PDF document text
    • http://htwy.com/upload/file/3687454647.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/gufaxamiso.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b8e926349d53469e2c9c6ee208ea4b09/69710507389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=cbt+nuggets+70-740+pdfPDF 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_off0000ec67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC67 17716 bytes
SHA-256: 2dfe282e4839e1132870c7d54a9cb00322278639acb622d2cf7f0a0514e353bc
font_01_sfnt_off00011aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA5 10708 bytes
SHA-256: 878b47981ac139161b8392dfdb8ff2beb58d5f62d7622f279cee88619122d0af
font_02_sfnt_off00013323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13323 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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