Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeafab582d7847fa…

MALICIOUS

PDF

83.6 KB Created: 2021-09-23 07:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db182bb47c55368fde60de8cb29180c7 SHA-1: 85f40d75c7a2b7ec5a5c624efc0772f27e47f218 SHA-256: aeafab582d7847fa05e71f7c6268cfa4e975a6990433efbe7e4a758277c129b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://allytemp.ru/uplcv?utm_term=scary+words+that+start+with+h PDF link annotation
    • http://ensky-chemical.com/upload/files/numenewipesukono.pdfIn PDF document text
    • https://valgott.com/images/userfiles/file/76152933479.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/lusumatulokowozukasafa.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10052690457.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/vifawolowezavekoro.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/gifovopijabipuxuzise.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/zopugudatoxiduliretejakuf.pdfIn PDF document text
    • http://cataga.de/beta/files/file/dajizividufi.pdfIn PDF document text
    • http://iact2001.com/userData/board/file/sukerozaguged.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210914_5EEE83E8B6BA00F1.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/xabamefidi.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/rosoxixa.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/kipuwov.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/25303946267.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/felakifipivilonopeni.pdfIn PDF document text
    • http://etkenkalip.com/files/51341897111.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/butef.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ap9stotiqthtra9mie96dbi823/6349675001.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/nosasorejupijirutebetaze.pdfIn PDF document text
    • http://drtamerturan.com/file/ligozefuzomos.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/34355135568.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/nuzazebubitomijowixaj.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109191758043779.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b54a66391---37083247722.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_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 18544 bytes
SHA-256: 6261e78c99ae2938f476362fe2848c56fee4e9b2fc996a9e6381b11fd41ede20
font_02_sfnt_off000128ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FF 10460 bytes
SHA-256: 6d42b7fb4d5fc4a8b643b4f00e83d731f50ece0780df2ad4a81c43ae786e7502

Open this report in the interactive analyzer, or submit your own file for analysis.