Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e44e403e7e24181…

MALICIOUS

PDF

76.6 KB Created: 2021-09-02 00:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 317da441517bb8afce3100c17e5cfc3c SHA-1: e82f8f142cbc2b3fedd8ffd5f3cbefe4b9c4d4ca SHA-256: 7e44e403e7e241818a564202568357a360b96c24ed174779a3744ded11423e1d
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised CMS uploads and disposable domains, aiming to trick users into downloading a driver toolkit. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the embedded URLs and link farm structure are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://canadanur.com/resimler/files/79081750326.pdf In PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/m7q0eno9ltci27lbpi1nl0b77m/nugagitepijuxiso.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/bigelimiwin.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/pimopufuzaruzu.pdfIn PDF document text
    • https://activepymes.com/pub/file/davixatavidotato.pdfIn PDF document text
    • https://businesslife.com/content/file/75816737046.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/65603068739.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/60350346834.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/46712273835.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/47176786358.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/makufivorinik.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/nukaqug78it8cupd2b2nlh1k4m/fifujamin.pdfIn PDF document text
    • https://anaksemut.com/contents//files/liliferenak.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/punibobejanisimugof.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/0sb72g7kpgc5ppc5k77fin4n3u/gekorovoju.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd46524bd8---83051580520.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/19825293109.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/rewerinanigusijavinol.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/9a32e38dd25be6ec2e7be507d0ae5d18/31959823235.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/8p2327ah11h1g4r3eq0c4teqa1/96079638323.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ejkf3njqeg102d5g2muohng552/38450069251.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/12530380254.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/vuralapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=driver+toolkit+cracked+version+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_off0000c8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A4 16716 bytes
SHA-256: 2b315fce6bc0ad07acf447d6ff81d23239489db6ed205b0b24ac31bc4acaf973
font_01_sfnt_off0000f3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D7 10608 bytes
SHA-256: a235ebc94ed9123eac960abdc99e5f8114f629aa2f25c7fdd6b494766e0aab45
font_02_sfnt_off00010c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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