Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d77e26d9b102f7b…

MALICIOUS

PDF

83.4 KB Created: 2021-09-14 02:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0105bc87270e77cd359967ca420ace17 SHA-1: c3d53c24bf4f1d909283e3a9a8348d2a158af642 SHA-256: 6d77e26d9b102f7b6ce1e20baab087b0101eccb699c2eabd500a45e57bd02943
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits vulnerabilities or contains malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host numerous links, likely for phishing or malware distribution, and points to suspicious domains. The presence of multiple unknown URLs further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://alacarte-grafik.de/userfiles/file/94185385013.pdf In PDF document text
    • https://girl0229960192.com/upload/users/files/zoduzitiwoxupamo.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/nefuganerepusawi.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/20794321983.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/mepamuvitapeve.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/12859099929.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/afd6b97ede63585b42a2277e3bfec045/41815383039.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/vovasunowadodipujananuw.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/sadosurozoluxuzub.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210905013356.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zexet.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/1eee089275f5e8765f0babc081ca45c2/79509120514.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/7154458278.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85244270245.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/1860591180.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49842044736.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/janowodibajazax.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/91485991705.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/56703153177.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/10917209728.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/72689502570.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/ripavedifamesekapu.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/53623621293.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/98841346811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=gta+vice+city+apk+and+filePDF 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_off0000e18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18D 17552 bytes
SHA-256: 65a6b26caed669bbb88a99b6274aa72a4b5997d523899348b2dc90d044a37c87
font_01_sfnt_off00010f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001277b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277B 10536 bytes
SHA-256: f48a25f34ccf83e13c3a21be5c386a6558d9e3a675b26914f6e4660cee3f1e62