Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1cdee8ced2f32e…

MALICIOUS

PDF

80.3 KB Created: 2021-07-09 15:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5e4478b6056d7dab85a13915eedf20b4 SHA-1: 872f5b9d2b271aeb34ab1dcef5a596c66d256f2b SHA-256: cb1cdee8ced2f32efe02c90e5101a2c666470c6344848ef6303638e5330f4285
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a link farm hosted on compromised WordPress sites suggests an attempt to deliver a secondary payload or phish users. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' further suggests a tactic to bypass security controls by requiring a password for an archive, which is often used to conceal malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16074fc15f3944---jiratofixidakigol.pdf In PDF document text
    • https://dintek.eu/uploads/file/83352836790.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/53071607955.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/rafaxemukej.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/32c04ef3ef4427762978c8cef0667d92/rimarigixidusubaje.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/hmo29sqiag547qg567bre3qvpb/34776314986.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/98124717591.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/pesawo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/faea64d4dee3ee3f6bcf496f50d71bb6/61157602019.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16099a305d5703---8442923159.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/f395be8538d49ffd0a09cf16819252fe/54466463804.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160afbf1b72d9a---xirilalafokumazujatog.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/75090888557.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/basevodigafobudajedafeg.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65fa064509---fumipufizetujafuj.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/91885036412.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/89685720322.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/82266456115.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c79fdb0534c---gufupivekepupit.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/gogisebunupipenalexudoso.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c55edb62c4f---palasixidevemijavodak.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/tumojiradabituxazukipota.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/26a88456f96479d2a56ba31664eb18d2/69037384641.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210617092829_369ghn.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=40+circumference+to+diameterPDF 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_off0000d185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD185 18632 bytes
SHA-256: 13227685e737cb81f298e302c6e9972d5e91a44ced3cb2d81fb9282a219c7ea8
font_01_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 10628 bytes
SHA-256: 6ac3700c6bcb234e988798628c5ad7b61a26baeb785a2c9813e0af8bab8637d4
font_02_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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