Malicious PDF — malware analysis report

Static analysis result for SHA-256 0384fadf9552ff6e…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 06:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 20cfb1d931a2b3c8c5338f6c7611aaf4 SHA-1: 1372c1501ed9b4e17e0c47494bb2f43bca8ed36e SHA-256: 0384fadf9552ff6e5f466fb223b1b956f6d50ebcb4710180dfc8957033880ec9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The heuristic 'SE_QR_LURE' indicates the document may instruct users to scan a QR code, a common phishing tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d085feadb086d53e7783c95cf2b3c945/nusexurarimuxarekep.pdf In PDF document text
    • https://buyafranchise.org/files/files/tinadumaxatukozibubuti.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/53905110593.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/35188080830.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/5667892597.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/ludasepifixunafubibaxejot.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/71207281221.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427742319ea---mukopawikutugidevugixon.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/14777706681.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/89a711d1e427b44d87f04523f7528c7a/pejorimaloxadesuf.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/fifaxunowiwudeti.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/vesej.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/romotukutawususizid.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/f13b37214bfe87516447bc23d3deafe2/pusij.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/biwaw.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/wajowajodemi.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/kemobaxidexibe.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/nupalizenuto.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/23590698153.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/2982824642.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/58151042350.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/buwelikinafisu.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/pemegefoseguvune.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/vawufubutotezidadesideze.pdfIn PDF document text
    • http://mextro.de/upload/files/nokin.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/2567735687.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=android+qr+code+from+imagePDF 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_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 18056 bytes
SHA-256: 358926a1d8127caf1fd99d8a330ca37ee707d0036ba8f657f98f8872ada7dfd5
font_01_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 10632 bytes
SHA-256: 1ab0255d2557b28e855bf8b9a24c41b99c01be40c8d0143e08032178aa9ef403
font_02_sfnt_off00012035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12035 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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