Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd69e152ab07a90…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 00:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ff12af2debab0f0635d2549f941db4d2 SHA-1: 229528fd919074c8096b8b1d29e3d2301ab35e49 SHA-256: 4fd69e152ab07a9006c1b5ce16e13093cfde2a017da8e8716b0e56bf221ee561
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains a link farm with numerous URLs, many of which are PDFs hosted on potentially disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of external URIs and the overall structure indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • 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.
  • 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://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc70bb2dc9f995ac943cb1f9624ba662/24534305425.pdf In PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/pudijinefopuzupizeto.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210909_443BBBE51387508A.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42955904069.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20210906023820.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/95227654755.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/88155003994.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/19608906159.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/pobiparugadogabamovog.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/xeteruser.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/fadoboluzogutore.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/bebefafajurarozelor.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/viwumijafuvesinosodin.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/rarigavaraworutev.pdfIn PDF document text
    • https://quizai.com/uploads/files/nezadevogerogugekom.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/19268529593.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613517dc3c671---dutadotelaxupowawakof.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/fexegonusurigiso.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/tipegokana.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/28933978665.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/13845315621.pdfIn PDF document text
    • http://jaqalsports.com/files/file/68908705530.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/56125331053.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/giniwojipiriremaj.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/wizofetisebo.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/75133268014.pdfIn PDF document text
    • http://kelvista.lt/images/files/sebodasozitinamumeveze.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/41539315550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=download+boku+no+hero+the+strongest+hero+gamePDF 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_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 17672 bytes
SHA-256: acbf15af81f56a0949d22ee1386f945c6362e14751db39da02d4c8e875c02394
font_02_sfnt_off0001284e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284E 11020 bytes
SHA-256: 5854397dcc97666b10dba51efb329c91ec31288f634fbd1919c0df0c2ff6a266