Malicious PDF — malware analysis report

Static analysis result for SHA-256 7384f59762986988…

MALICIOUS

PDF

84.5 KB Created: 2021-06-28 23:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0b51bd95390888225814ff0d8f58fe86 SHA-1: a8449ad7be0fd872e7d6144a860bf0f507b278a4 SHA-256: 7384f5976298698812b4d37edbecf414ff391f1fa76d31672e750be74411b620
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it functions as a link farm. The primary goal appears to be directing users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://krisoc.ru/uplcv?utm_term=reduce+picture+file+size+in+powerpoint PDF link annotation
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b67cf0e9436185a97985d0273993915d/porikadis.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/88243963753.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/16b5ece91593d373f9b77b52bda33263/buxagibemomolidupotogo.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/8d90bd82772f3183217dafe6d6f847a8/natulaliwujesudujukabub.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089778b2d6b1---60659525227.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01b94392bd---gosukatalumijosuvalefe.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96ca6b1578---wopakowima.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/kafotimulugebu.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c494e838bd---73483638580.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/97606581962.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac31edf21bc---namevotanugilafexapo.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/b06ihpu94954db8aoius7n182k/bavikufozironuvizub.pdfIn PDF document text
    • http://halaljones.com/uploads/files/xemazisazotokasu.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/ab60b1cca564dcdbd2414b8cf840e60f/bonekotow.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/wofufewiniko.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/fab05sq9jaoa45haoaooeo0tk4/59890483824.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/kutirimi.pdfIn PDF document text
    • http://heureka-cz.eu/files/guzewebakifup.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/16uss925flfbe5ad7u9mb189do/beluwemipapu.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/putezawuvewez.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f8882d1c2---82454628990.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A7 16956 bytes
SHA-256: fb747b7659e72cbd6aab8f5fb1a62daac52c3596b6b52a1c34df4592829d5d3b
font_01_sfnt_off000113b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B1 10744 bytes
SHA-256: 4bd77954b83c8bbdc068ba6163334c6c33d4c27815a230ae0c993528251da6ad
font_02_sfnt_off00012c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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