Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc9826fb6a0326b…

MALICIOUS

PDF

77.6 KB Created: 2021-09-20 13:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06be3e8b28fa1ac2b6fe8ba259b02cbf SHA-1: 6377dd62f57759239e9e7d8ef4ab9b4276ce009b SHA-256: efc9826fb6a0326beb52435dd2339da3d4f64529e46fbfa51a20f72baf396724
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Heuristics indicate it functions as a link farm, containing numerous external URIs pointing to various domains. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent. The presence of many distinct, low-link-count hosts suggests a tactic to evade detection and distribute malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3768

Heuristics 4

  • 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
  • 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://primax.fr/wp-content/plugins/super-forms/uploads/php/files/t08u3t6efb37md069qkr1lh6n2/buxexugufivigilatu.pdf In PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/16734321736.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/78708301046.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/44585236294.pdfIn PDF document text
    • http://elsped.hu/files/file/76241693863.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/12619378001.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///wejefilo.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/tuxotogodibiwofej.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/nanuv.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/katejeponodemuviwidorulo.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/32258762596.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/94163403500.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/dizupa.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/25021791795.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/gosokuxuvenosiwugelidaza.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/25499032332.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/7351996933.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/24270658926.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/lisuwatexoxotozomu.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/dezifidekudarogezuxa.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///49160663944.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/77111495929.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/53792912176.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/51691369333.pdfIn PDF document text
    • http://sdds.be/userfiles/file/wixipiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ping+server+androidPDF link annotation
    • 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_off0000d824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD824 18744 bytes
SHA-256: e4321eba8b9e213233b7835dbe9f9d3c1da94e085a4483251893c0fcdb05391e
font_01_sfnt_off00010972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12189 10344 bytes
SHA-256: b2470cc49e0ab93176c382e7d1045a51228907e64ea2c38fcb70bba7e5b611e2

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