Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ffe1b178e01c10…

MALICIOUS

PDF

88.2 KB Created: 2021-09-05 13:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3403a6719e4d1e9a664b2f55a55d3245 SHA-1: 444bbf1ec6e446b238cde8ca753b5a8a3d54a371 SHA-256: b0ffe1b178e01c10635c4f1fd4d3df830495e431ebdca9b2004ad78d36dd48eb
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nomylo.ru/uplcv?utm_term=publication+15-b+2018+pdf PDF link annotation
    • https://108pizza.pl/uploads/userfiles/files/kulebis.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8cgg54bhc4th5misjepruc94p2/norewevufesewipebapufa.pdfIn PDF document text
    • https://baglab.pl/galeria/file/genato.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a669d9dce53---8410495470.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/16755869109.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b853f20d37---susaxajoxatut.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096737a89cec---vizukixawigekujokowun.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/5436314873.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ee265691e6d---soxixunikapufokokenige.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/43830469225.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a7d9e8f7c4c8afb63f2375190c31aef7/73719800989.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/5e456d4e20a4034cfc2c4e96ea0478cf/lefifolazadisadakuro.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/77947235401.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ro4pktba9dj188mcus9hq671o2/22126605630.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/26398058396.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/48043662780.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/79a811uh17md04q5tv62solar0/mibozotumozosefikelovewip.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/85492502592.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/tja44bqdm2o3jkvlnv8vcb8mnl/95499682473.pdfIn PDF document text
    • http://gyobel.it/public/file/91629986570.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/pugirafovorosidek.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/butegumirazumitidi.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/5b3884eb8373f3cc4d547c852dbef80c/bokixapikalu.pdfIn PDF document text
    • 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_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 11124 bytes
SHA-256: 1c7b44c4e2f10ab7e6875d07de39bb7b3707f1af39df4a3db9cf7f0b2b2c975e
font_01_sfnt_off00010af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF7 18676 bytes
SHA-256: c7c74ac6e298c5c7bcdf6347898a23393066006bd10487de068a3e73ef34542a
font_02_sfnt_off00013b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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