Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e05d72207531b4d…

MALICIOUS

PDF

79.8 KB Created: 2021-09-08 17:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f30539f367aeb7d0f794114047ae7c56 SHA-1: 1f7a6bff1614dc068d8feb7d6eaac92e30e70223 SHA-256: 2e05d72207531b4d3c8a95bccbb61831d5d40f574983d1ba4058b6522f1d0623
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to potentially compromised or disposable hosting. Heuristics indicate it functions as a link farm, with some links leading to compromised CMS uploads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

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
  • 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://teater77.nl/userfiles/file/bovit.pdf In PDF document text
    • http://labsshop.com/d/files/texofazu.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/vojaxubesivatenoj.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///90790247604.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/giborikaza.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/15905497355.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/fewotagukunofajedud.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/96058470191.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/0c4fbed6331ff0fe54aa3edd0e32c5fa/pawuxemoxagenegozi.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/votobiwuziwudorovemotar.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/duzidabavutalowataberuges.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/85411041784.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/bopatidomal.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/zinusolubolezon.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/1dd0af25ef60eb815b545eb3dabf6095/83884561319.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/39775949142.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/96824551586.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021090200561086.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/magiditoj.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16136917484958---1248278169.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/getoli.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/mipojiloxexosix.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/nulid.pdfIn PDF document text
    • http://infracsap.hu/files/file/69346211142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+make+a+paracord+bullwhip+pdfPDF 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_off0000d3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AE 17404 bytes
SHA-256: 519c71231164daeb5a2061102d1eb12b63bf1b93c1a871c861c4e9e09025b092
font_01_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001187f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187F 11024 bytes
SHA-256: ddc64e406b576028af0cb274f71939560e44d9b16cda88041a7d2dbdceb1a896