Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d47d91b65ec8575…

MALICIOUS

PDF

87.3 KB Created: 2021-08-10 05:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 973dd396898fb51a761b979f1b508a03 SHA-1: a6cf0c94b4e62bec37d1b75dfbde1f707fc65bcd SHA-256: 7d47d91b65ec857574557963541f22577f727c4fddec566f3e7c6a74a5c0c1ef
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8864

Heuristics 5

  • 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
  • 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://novosib-sport.ru/ckfinder/userfiles/files/37121655737.pdf In PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ec510d9997b---feragivujosoxu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ef3b9e36---77880537835.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/6q5l2vh0ofilh52im03drlejdk/gunokam.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/dosafodo.pdfIn PDF document text
    • http://allasclub.com/campannas/file/50815511122.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e86fcf544---2339374318.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/58640795068.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/21719920713.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/1b3640e0da1da777d829e7686c4ef5c0/nuvakevafoxujawujodagana.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/f3a57faa0643cca679dc5decedd9e2ee/tiritosut.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0cb25fc9f---bawosaselaper.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/84253e52aef141fd4b042c6ab036392e/63437969620.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/2j82e6m0r3ibvrlgbnglj8o6t5/40637051401.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa32f30056---puguwibenunakewubexalala.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/56415324470.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/74511444980.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/396b8f76e9b4e426465a7911db82e333/dodotabolimobutekobaxur.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/73755663250.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/bizaxetidamaremamax.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cceb1a5ea---rajafidikadum.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/tupikasolugalo.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/29061104487.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba928f31b1---60248590448.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607383eee70a5---kipaku.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/43193221572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+can+i+get+government+scholarship+in+ghanaPDF link annotation
    • 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_off00010169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 16824 bytes
SHA-256: a8bb7b1e75f1a713de8bf3074809159b371c612ee958a200f70b2aa343b43adc
font_01_sfnt_off00012d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D29 10964 bytes
SHA-256: de90ccfacea1b1fb769bca95fc2cb3d1829137848c987c609140e365e50f1310
font_02_sfnt_off00014671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14671 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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