Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef99120787086246…

MALICIOUS

PDF

80.1 KB Created: 2021-09-03 04:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8fd1318819c714c47e676e9936d2b2ae SHA-1: 5f5f634c6e7b5ebfe955b86488746a5c1b8f1fce SHA-256: ef99120787086246879b6c549ff453a5cb807ee51deea8cf96a57c2e42b929b6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various domains, many of which appear to be disposable or compromised, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://onthespothousing.com/userfiles/file/tikovagowufenaw.pdf In PDF document text
    • http://smartwealthhk.com/userfiles/47248354010.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/51667740193.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/duvulo.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/zuzawikududemopakitozas.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/88805815313.pdfIn PDF document text
    • http://watch62.ru/files/files/32953952932.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608902e10aca4---87469689519.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/sobokimixoliz.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/f852c13f7f763e07b8259f254605a01f/11391943630.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/85907065461.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/28507999778.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/feder.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/4704018237.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/55355657428.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/322c52b69fd139e88d61fbf09ea25bd7/xoripixiva.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608601e17065b---judesupawusuneresaderales.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/7rraabcobf1fvmonkbqcvtke5c/faruxezulunivik.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1ac78a791---tedadekonepu.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609246910c3c7---wufopekifopugigafeg.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///virosevemoruwapobuxa.pdfIn PDF document text
    • http://riversedgefm.com/files/file/12571286180.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117430eb612a---sobuvowaleluta.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b8296d59---batewotawamixadunavajoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=linde+forklift+owners+manualPDF 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_off0000d55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 10752 bytes
SHA-256: 96a514cbdcac58d767066d62bcc2efa594281744b66e34aa6de0ed5b8f33e643
font_01_sfnt_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10634 17244 bytes
SHA-256: da3642ac10d775550c5066622ad02b554a47f20a939af5f6381be2254b8d763f

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