Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7718ca5f43ecd0…

MALICIOUS

PDF

223.5 KB Created: 2021-06-24 07:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0d90d61a17d98ad2bb07cb7ef740ced4 SHA-1: f7e954da911aa41035dcb5458fba8ef3a66e3b37 SHA-256: dc7718ca5f43ecd07dd0c72fb1cbdd9b0b36add1cdc9b14a287c525a1e92818d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it is likely a phishing or malware delivery attempt. The heuristics indicate the presence of external URI links, including one pointing to a compromised CMS upload storage, suggesting the document is designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users via malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://beautydiction.com/ckfinder/userfiles/files/gasaxuzawapoxuju.pdf In PDF document text
    • http://meskerjager.nl/media/files/nizower.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/welade.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/fmgovjelpp3j9ouoftdkllc2ph/zojelanozuzewuzufiri.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c835b0e3fb---22913115405.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/jaxatifuvob.pdfIn PDF document text
    • https://bachson.net/upload/file/13615666953.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/memabakazudatorev.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/96399747528.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/xeboronexi.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/3f8p2nb00uiqbtm8e9l4rbjbke/bukukego.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9e74768bdb8675ca77f8afb041f31dc9/10242226555.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced747cd58---ganibaxapugotarome.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16070c3f0c3fad---dilupelame.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/segusolepeguvukenupuma.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6e53b23bc---18424272533.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/83299593796.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/4435397777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=imagemagick+pdf+qualityPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000331f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x331F0 5428 bytes
SHA-256: d41aef87eb2adbbcaebe85e29f06a15cea81d1701866cbb8462871a5b1f8709f
font_01_sfnt_off00034469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34469 12540 bytes
SHA-256: 9d5201f6ca9549e2f1ccbca57efb98db073e34db39f25d648a789fe2a6f3763e

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