Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b32e7f454cc1a7…

MALICIOUS

PDF

80.2 KB Created: 2021-09-07 07:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b91f5dc8b94fa3da5477278fb2f92599 SHA-1: 5a957bd9f23c2d2fed7f9f58e08e3686967a83b0 SHA-256: d1b32e7f454cc1a7604a7edd62bb0910700be974d4f39e9d0e0ce6326bf27e79
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous links, many pointing to potentially compromised websites or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the PDF structure and embedded URLs indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://parklanehotel.asia/userfiles/file/80785102508.pdf In PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/40891086919.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/27411289142.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160761cbc41958---zeginu.pdfIn PDF document text
    • http://abwrva.com/uploads/files/wikawidekemagigojemop.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/bujawe.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/85905502439.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/faxikebobe.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609102ebd54b6---68755639114.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/50469673149.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/foxanud.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/q4u53v9nji38cnsdmuoi6k7ot5/jivubakojopegoso.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/49343679662.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4ff395768---wusotujezamipagilafefu.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/84453874963.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160757159d33c3---saxakimebivo.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021061009183661.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/wolikilukezifomoxalase.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/40514120586.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/s1tv7eqb8oplmhtm4j7qc8d8j7/fanuvezewum.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/83260715053.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/durosavajezogijirodixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=crochet+granny+square+patterns+pdfPDF 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_off0000d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 11152 bytes
SHA-256: 344e53efa87250a4025dd7e382c0af59d9056b3561d2bf0649ee465c7ae75ccb
font_02_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 16536 bytes
SHA-256: 42e6d0b86da0727092bbf31f1b83c7bef21c6980d3cd4ac0eee89097062edd60

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