Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd097ada7e1b35d5…

MALICIOUS

PDF

78.1 KB Created: 2021-09-17 10:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7deedae0d435104145532aacfe40ff9d SHA-1: 46e1945da496fc5c9edd5ad5dbd0b028f2ac213c SHA-256: bd097ada7e1b35d55db47735ecb38b8314085540dcdac9b6485db1e5b07aaf4b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The 'Urgency / deadline lure' heuristic further supports a phishing or social engineering attack pattern. While no scripts were explicitly extracted, the PDF structure and external link behavior are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.abcklima.hu/data/editorfile/gatuguboromevefolebi.pdf In PDF document text
    • http://e-store-sys.com/userfiles/file/pawerisejetol.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b7502a5e5---61542799568.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/xuzebeweb.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/laloguvisilimovafukaj.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/93367486315.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/40615291853.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/30210296096.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/26069041193.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/73317805900.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37124960116.pdfIn PDF document text
    • http://benly-carson.com/product/files/77124767685.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/1683872155612fef3d225bc.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/zukoleb.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210910085504716.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/kakizogosok.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/vogam.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/muzekikakiludegefidi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395b7a0947f---vezosotetixakub.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/nulodinufifek.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109021736432249.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/zosiromafalimuralogixi.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/siwuzuvenazaxek.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/39088223307.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=game+turbo+xiaomi+redmi+note+9+apkPDF 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_off0000cbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 10980 bytes
SHA-256: eb19ea7287aadbf214b73d366957ea40456aa8d7c0b4bb438f95f82ace1c2372
font_02_sfnt_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 17000 bytes
SHA-256: d90d144d399e1501a30c2a6ccc07c775c899bafa7bc03fa98687ae5a2380a2ec