Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0213e088f27f2ee…

MALICIOUS

PDF

82.7 KB Created: 2021-09-03 06:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 485034ce2d35348ace796278b49b9983 SHA-1: 29e108643ad85da4735a105b32f70be88082f681 SHA-256: c0213e088f27f2ee01d517a496cf856e865a0511495923c1e746aaa6a1e2cd29
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous heuristics point to the PDF being a link farm, with many URLs hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs and link farm structure are designed to redirect users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://garglob.ru/uplcv?utm_term=foxit+pdf+mail+merge PDF link annotation
    • https://daiichitravel.com/uploads/news_file/dezixejureburi.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fb3072335af---wusuvakonesozo.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1611298ffac07a---zafinegaxowu.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8732e40b86---72447427235.pdfIn PDF document text
    • http://ithaca1961.com/clients/875375/File/lezapugujiwujupitaxu.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/12843805493.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/89883501962.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/59715696612.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/24515880635.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a579672c108---viviluzuk.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2767c8996---muvadanadixus.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://www.deco-interieure.com/userfiles/file/joderaro.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160e3e04dcbd06---bikoper.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/2a40df2f66b5da2736f83898b6ac8c28/90666770092.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/85063634996.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/nuvazuwabadepabuxif.pdfIn PDF document text
    • https://panama4d.com/contents//files/rejinopajasikux.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/44074732128.pdfIn PDF document text
    • https://majubesar.info/contents//files/nadaditojimasediburaxogep.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/ramejunusomilekon.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/todomebizevagavenovidoti.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/rojenukopidosezanalu.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/6a72cde53e376f524c3ab9dcfefc0b32/93068897723.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/gofudagojawibomitiwop.pdfIn PDF document text
    • http://szcftz.com/upload/nugupizapowewababimufo.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/zebumotimu.pdfIn PDF document text
    • 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_off0000de80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE80 10648 bytes
SHA-256: 0fb51ad98fc391250686b951fe685c403ff91a6346e681cc53983e279d78fde7
font_01_sfnt_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 17684 bytes
SHA-256: 25bbb2f4bf462be5cc07d43befdbf8183d079c6fd8de774abd4aac66f88f5ddf

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