Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec34dfba7d2ef41…

MALICIOUS

PDF

105.2 KB Created: 2021-08-21 14:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5f567d574eee801ef0e71d1bfe8ae786 SHA-1: f9d37ed1c91c26972b83b5e4f03a1ea368f82a24 SHA-256: 1ec34dfba7d2ef4119b9a9dd2916af6eed5db8d6ef8146962c20cd9caa522060
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of multiple links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2a306b4a3---91863033885.pdf In PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/92046916115.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/6cede75f8fbeae224fa1ac7d6975741d/96745136748.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/lixulaparogobop.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/12682fb6172e1cbf559b876bbee2bed8/31587877245.pdfIn PDF document text
    • http://kasargod.net/uploads/file/89150556536.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/7f32ce78a4a469cc652d23643cf533ba/zidubaf.pdfIn PDF document text
    • http://kunbot.com/upload/files/mibajanunikigabonegajej.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf50e9c9b2---mevedarulirabo.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/39867538193.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/zunididifozerozuzegon.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160773926d339c---98447757686.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/oi585v1ju3c3a06c58j28c3ef6/polepu.pdfIn PDF document text
    • http://charivne.info/images/file/deromamudigexo.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e00e25366---35117056502.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/fifemakejudadejononumaleg.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/jatibolubixe.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/24672120706.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6b88b9fb84c659c453b6912c05b52317/levadenozovepejuwufozena.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c944b6560---22078840428.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768a6dc68f2---48718960663.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///47645302268.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=alfabeto+fon%C3%A9tico+espa%C3%B1ol+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_off00012c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C85 10996 bytes
SHA-256: 33fc03e5586ed8e4b19a5afc4540356f46e8e3f64fa5255b68130046a2fb5e75
font_01_sfnt_off00014573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D85 22000 bytes
SHA-256: 4dc106ce4642e861dbe452cb21e382fe917b9985284b6e01a096e7f7806ff2b1

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