Malicious PDF — malware analysis report

Static analysis result for SHA-256 70305d800b55f015…

MALICIOUS

PDF

86.5 KB Created: 2021-08-19 13:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 779449ba9391235a2127046abbb9e69d SHA-1: 8e5ab5b589eb4185218c6c067bc982ed351d6156 SHA-256: 70305d800b55f0154f4a522565a19cef20ecdc1d371f04fb97a72018b87cd24e
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous external URIs and link farms, many pointing to compromised WordPress sites, suggesting it's used to distribute malicious content or redirect users to phishing sites. The presence of urgency lures further supports a phishing or scamming objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://medvor.ru/uplcv?utm_term=bodybuilding+workout+plan+pdf+download PDF link annotation
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/2hehea8dr9eoak06ejo5i2ensr/vatamuripedirokanarexa.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/wotofokijoribepekap.pdfIn PDF document text
    • http://ciskmv.com/css/file/vasumakofupabuxokuze.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/8dvh0rrlj5mmrur485ktiqa7i0/32385566589.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/2bb96e39ca45e4cb16f84aa627aa5e97/bemako.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/43715708895.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a28b5a8314---20633253790.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/83357930842.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b6513c6fb---zusukubawugel.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/rapabagigavifavatedis.pdfIn PDF document text
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/bowomefileruborukiwazuve.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/piwoxuxubipikikemipirori.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1611cf8d158000---nofibubazozov.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/movovegerikejonedipube.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/xuvebofesuwexojufidagud.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/25024027282.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/19502552367.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/tibunifubetasupiwupugitej.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/sawubowujamijajo.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/rimoxeda.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/cddde7cf094116579d71ffd630dd8686/30900914174.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/92044467135.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050109285773499.pdfIn PDF document text
    • https://ancoraeducacion.com/images/nirika.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_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 18008 bytes
SHA-256: eb18448e27021950276b8a89dae600e983b0e190ada01d65b9857792994df4b0
font_02_sfnt_off00013368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13368 10956 bytes
SHA-256: 1071c2cedfe30b2cbf242be6a4c3b6b96f87457567727b913109276349104a19