Malicious PDF — malware analysis report

Static analysis result for SHA-256 012f309e700af417…

MALICIOUS

PDF

74.0 KB Created: 2021-09-10 19:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 824bd74bfcfe3a13b20c621e4d319114 SHA-1: 739503944c1cfcc9cb1915a332d8de5243679db6 SHA-256: 012f309e700af417e3c985fa82f5156dbe9cd76fe68c5a54c5596c918f0a80b8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and other PDF files, suggesting an attempt to distribute further malicious content or phish for information. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://krantiservice.com/ckfinder/userfiles/files/55377491387.pdf In PDF document text
    • http://zl369.net/userfiles/file/40934446401.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613809587495a---xesugumeluzanu.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/44608970932.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109081301399210.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/79448867764.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/53226677883.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/81438734280.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/6583670d91b567e170d98e0983da5519/22991112167.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/lisojipiruzebupup.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/50588824329.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/54529910864.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/sezurevulerezeberezaj.pdfIn PDF document text
    • http://tzsunup.com/upload/56811113026.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132a29990c3c---50753043439.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/libij.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/guruwazonesarefekavuj.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133bcb4b4259---73733177439.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/dezubixitimizowug.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161368e256622a---detozesik.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/50233880501.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/paloxaloromolopixebu.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/46552353608.pdfIn PDF document text
    • http://stisk.com/file/6237512223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=direccion+de+mercadotecnia+philip+kotler+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_off0000be4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4B 10812 bytes
SHA-256: 75e6e21d5fdf7905bbe0fe786d60ed593905257b2ccc6b42238898ec0cab18f0
font_01_sfnt_off0000d6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F4 16964 bytes
SHA-256: 961ebb5270cddac0564747db85d8011e2d5d32f6e70af9c2a111356de0136379
font_02_sfnt_off000101c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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