Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4f08ffaa41b06e…

MALICIOUS

PDF

83.1 KB Created: 2021-09-13 19:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80ea6ffa3153d23ebdb6f25de847317d SHA-1: 7ad91aa32bec539c316ae4ab02a9b7a36ce9eda0 SHA-256: fe4f08ffaa41b06ef8d71dc2841216e2ef4888b4826a0a4d28eb848da11a4cc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains a link farm pointing to numerous PDF files hosted on compromised WordPress sites and other disposable domains, likely intended to lure victims into downloading further malicious content. The presence of multiple external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ssmavidiyar.com/public/content-images/files/83308653476.pdf In PDF document text
    • http://clean-ecology.com/Upload/files/53449204860.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/99161062179.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/bemamiji.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/pikusujokesunotijelone.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/sewogeninu.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/379cd3984c4e5c15a4cd824a98b9f9a9/25782713316.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/85895004615.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/78321366272.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/padovevetidowovug.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/21582481561.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/5083938528.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/merelidurijul.pdfIn PDF document text
    • https://redac.ch/upload/sejigeb.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/kaludotovu.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2acebb202---15761024180.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/68140759733.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/34806104482.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/1fc614abb59acb991ff6da26a75db816/xolewiparido.pdfIn PDF document text
    • http://www.emploi.nat.tn/ckeditor/ckfinder/userfiles/files/zemoxoporimudujijawafo.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/xatapu.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/50165fe47a77ab062c5ade3a669fa135/nunufurewedabupibezeluz.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/uh7v7jt6rnbjuoqe3a6iejdqe6/8803815248.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/25310349319.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=manga+drawing+pdf+free+downloadPDF 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_off0000d570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 21948 bytes
SHA-256: 733da5bffc0f643e388bbcf7387ae8a3ac68974f521a5800bed3c47065a11496
font_02_sfnt_off000126de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DE 10484 bytes
SHA-256: 4c05cc2c55ff6fc6feeb224dbfb3ffa9535ea53c786cae8739f4bea31d9cd3bd