Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e912e5ff6f1735f…

MALICIOUS

PDF

82.3 KB Created: 2021-09-20 03:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2c6a573c62263efd41e0f6e8aeccada0 SHA-1: 66fbd52956b931d7fdbf920c7558829ec24c44e5 SHA-256: 9e912e5ff6f1735f74359ae2decaa39917e0168a839f0598eefc221d3a661f6b
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The sample also functions as a link farm, hosting numerous PDFs on distinct domains, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sissonne.hu/editor_up/95455111034.pdf In PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/76728214963.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/89556204671.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/rasawoxazazaton.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/tufatafosu.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/xugebirotabor.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/lesemod.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/bafidunibagikesupedonafik.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/pibojutededa.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/mumilidavumorirug.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0bf9dbee0---kanidanekozanapop.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/kenakafunoxarajikipazi.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210916011531.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/521e2f3d2ef114583200430be0f578f1/zebafakawixarixorib.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/75041759832.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1631686427koxaxa.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/kufutafejolokopake.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/tonixurozedofax.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/rogufekinimazasogod.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/3033189848.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/padatoje.pdfIn PDF document text
    • http://njxinbell.com/upload/files/zalajomomineka.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/38188862069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=clash+of+clans+best+army+th9PDF 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_off0000dbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE9 18016 bytes
SHA-256: 2da1cff5ea658407cc05eaf2ac0fe14aa2c3d8e1eeb612c8cfd0e646d7603933
font_01_sfnt_off00010a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A77 10964 bytes
SHA-256: 1389b5af3e032877d4d8bb1d3cc907243a783591a4b84b57e50df67955d6fea8
font_02_sfnt_off000123d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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