Malicious PDF — malware analysis report

Static analysis result for SHA-256 97788eba05b49e35…

MALICIOUS

PDF

84.8 KB Created: 2021-08-21 13:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c9effac59cd4e3dc57db56935e820b5f SHA-1: 9016faa050c152fb2d253c55bb0d677fdfb9788e SHA-256: 97788eba05b49e35bdb74281745135d2a9722185986bf4a34f918731e50cc6d7
164 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links to compromised websites, suggesting it's part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/b83923c348a0e7cf3cb94a5c41a94405/memevo.pdf In PDF document text
    • https://airflow-skateboards.com/userfiles/files/rilolukomij.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/95539971915.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/d1c15d7acdfc0a53f35658c85182f0c4/towinidatamikosinifakibi.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa674a51826---jabafum.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/78533779014.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606f557971776---vamekojumegobaroxed.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b684cb13d9---18389331180.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210707_025238.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/kuwotuveduniliz.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/66794765500.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072dc51c3fe5---33659336100.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099351e86827---29975409521.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/em3nngti1kjlt758ep8n6fu7i1/52872674686.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebbaf9ce68---zefiwelarorupugur.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/xulesufo.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c283039e3c---firajiponajuxebevujadedub.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/3819664f6b8fa528925ec22d06a052e0/vogolabufatodunabu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/bed6a709431a1a9d836599e70f08b782/remekidirilixasapa.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a3620df02ad---wisilimonawu.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/gunudaxutabebew.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/fewufumas.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/7028corkdrvbv57mkdhjdif4jg/34246555740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=anando+brahma+telugu+full+movie+movierulzPDF 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_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 10980 bytes
SHA-256: f244fff42dee2017bef8df99d792137bf0b04b71c43e91ae6079f19d92950e83
font_01_sfnt_off0000fd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AC 17100 bytes
SHA-256: d7b87afb872d6dfedb559fdb8ba927406f1d2ad5c7b076e1794802ab25974d59