Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5e0a161aeb0fe9…

MALICIOUS

PDF

85.8 KB Created: 2021-10-11 06:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4c680c2707d9d5fe4454e4b711deb95b SHA-1: 388d1f67455469d75aa4029e615fb4b532a2c02d SHA-256: ce5e0a161aeb0fe976741571f44cdbd170c9b5dee026349b22dcff7a588ce5e4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use as a delivery mechanism.

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
  • 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 https://philabc.ru/uplcv?utm_term=what+does+nb+mean PDF link annotation
    • http://apex-architect.ru/images/file/xubazuwutudesidor.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/zezifemuvobasuvepegizer.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/miditulo.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/39108134707.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/kavolat.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/fanugolilakutuwuzeweput.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/dijowej.pdfIn PDF document text
    • http://getvisa.ru/images/File/39984741888.pdfIn PDF document text
    • http://retailcop.ca/files/lexorena.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/b05859a99ffcde58296fe1f9ff5550e4/gegokiwaratagatukuxizesi.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/nogenupuxefipijunokij.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/vibuxukadu.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/begijununopuxoxid.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/76133973947.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/tukavabigumedezazo.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/21489841312.pdfIn PDF document text
    • https://heyratacademy.ir/file/87123543327.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/47255394597.pdfIn PDF document text
    • http://koutingchina.com/upload/files/kipirezomerovofejugifawex.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615614830fda9---fexifojede.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/fagalasutigomofo.pdfIn PDF document text
    • http://js-space.de/userfiles/file/korometedomufupino.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/tefozeloledisofotofesopir.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_off0000e448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 10408 bytes
SHA-256: cff7b2083bf4d71f2f971e513148a3974911c2225f6052ecc1dffdbd184881d7
font_01_sfnt_off0000fba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA8 21036 bytes
SHA-256: b4dbc27fbff7975235e56d10b59d333f82c5adffd1a6b19dc8bc784bf373abf0
font_02_sfnt_off000131c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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