Malicious PDF — malware analysis report

Static analysis result for SHA-256 e211bcd10b8f16a2…

MALICIOUS

PDF

82.1 KB Created: 2021-09-21 04:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f2fa083cb70d37593fef83f3c60fe55 SHA-1: 891164f0981b1eb901998c1b179b196171f1c54b SHA-256: e211bcd10b8f16a2bc78203c2c6cc429bbb5550ee7386da43cac373eb37c3256
166 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam lure. It contains numerous embedded URLs pointing to potentially malicious PDF files hosted on various domains, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics and the overall structure indicate a deliberate attempt to deceive the user into downloading and opening a harmful document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://chcial.ru/uplcv?utm_term=real+racing+3+apk+free+download
    • http://zssadkowice.pl/pliki/kurakadaba.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16141ac7d1b038---42094952975.pdf
    • http://lecieldesandes.fr/ckfinder/userfiles/files/nixufarewu.pdf
    • https://topclassgreenery.nl/images/file/71492516934.pdf
    • http://studiospazioambiente.it/userfiles/files/67321053137.pdf
    • http://strelnicebudejovice.cz/userfiles/file/76576963908.pdf
    • https://thucphamtruongxanh.com/Upload/files/piledajiliralukadajizoz.pdf
    • http://hanifeugur.com/image/files/vugusozidabirirebuk.pdf
    • http://agecarekorea.com/ckupload/files/50565842066.pdf
    • http://taxplus.in/images/contentimages/files/lidojakad.pdf
    • https://mytshirtcreator.com/app/webroot/files/file/98632326685.pdf
    • http://frutapacargentina.com/ckfinder/userfiles/files/57688678200.pdf
    • http://z500.si/files/995172730.pdf
    • http://rescue119.org/userfiles/file/48758915091.pdf
    • http://danieldesignpro.com/userfiles/ratitutazagufetetasu.pdf
    • https://rhodium.vn/uploads/news_file/ropamefe.pdf
    • https://www.pessin-location.fr/ckfinder/userfiles/files/17456216993.pdf
    • https://mosconi.net/userfiles/file/37277426151.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/bojelurodegududov.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/e89b24g8e837qltjt13qrqgi8p/tuzugetewazutegabogasorix.pdf
    • http://nriloan.jctoursandtravels.in/files/jetozelasi.pdf
    • http://esipro.fr/userfiles/file/88270554853.pdf
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/32298523736.pdf
    • http://firesecurity.sk/userfiles/file/wukekemabamolelosujadate.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf8.bin
42d236c71dfde2c5d5f54670f869e10df31e8b6b3dd6094f443a82f2fd9c5924		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF8 10924 bytes
font_01_sfnt_off0000f43b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF43B 16792 bytes
font_02_sfnt_off00010c4d.bin
3557054c5c9fb7b5fe52caca62e7a562e4845e6017f68d315258a4dbed9e0ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 17820 bytes

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