Malicious PDF — malware analysis report

Static analysis result for SHA-256 0765e7e05cd19f5c…

MALICIOUS

PDF

78.1 KB Created: 2021-09-01 09:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: abed35d53792d37f1b76250869ee64d7 SHA-1: cb430da9583df10045418851249735ba951d2e82 SHA-256: 0765e7e05cd19f5cb9a977e36b92fd90cfc4f0d73d09f16fbcd4f4567467711a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests a phishing or redirection attempt, aiming to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://capesociety.ca/uploads/files/20962618240.pdf In PDF document text
    • http://web300k.com/upload/ck/files/zorojuginera.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gujakonesomirakewawusik.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/tegurezib.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/hq6gv3m1d2rg33aeo82rfpra52/92069748955.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ab0bf12cb---nonugukowedibelizuxaguse.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfba4acc75---82150552517.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/jokotiwovujozaredenupitot.pdfIn PDF document text
    • http://turatabor.hu/media/sexatixuvuwurukumaxafer.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/e43is76hev2io8mn0dolffoqup/23633831912.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608009b474dc4---sageboxamomabofogog.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/losuketivixapovajo.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/jigefubevewora.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/afb6opvvjnad2vgcigqfr2cobh/73221398424.pdfIn PDF document text
    • https://ksuskalology.com/images/file/57597800133.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfbf24d2a8---68386629393.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7b17e1f65---vuzivajetakedu.pdfIn PDF document text
    • http://svx.su/ffile/file/80429175277.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e55bd2d72---31423562608.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/35440652626.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089199fa4bea---newaze.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/34906746122.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/fisibibafiruzufimilabek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=temporary+protected+status+meaningPDF 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_off0000cc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 10988 bytes
SHA-256: bce658ed72558403daf6e4ec5bae038fa4b66f0327ca40c05e301b6ccb6f4625
font_02_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 16888 bytes
SHA-256: 534cddc5e70dbb569afa83e4b3c711c7f2153315698f75fde09c75c26480b992