Malicious PDF — malware analysis report

Static analysis result for SHA-256 f863250004f0b6d5…

MALICIOUS

PDF

88.5 KB Created: 2021-07-15 15:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 632f0418b44ebccedfcdec381b8be9d6 SHA-1: 7cd27436012d1288583cdd18000684ba52f5a314 SHA-256: f863250004f0b6d5455def8afe524effbca1e1e2c314a657903eb3f827c78cdf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms, suggesting an attempt to distribute malicious content or phish users. The primary attack pattern involves redirecting users through these links, likely to a secondary malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/96d2ico2qmkmb261f1f1nr14v9/5985424604.pdf In PDF document text
    • http://anaminfo.com/attachfile/file/10073660268.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ff55a7077---piruzivurudugofarutaman.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3b1769f5ad08253ec87a17b8333e512/peporabunitakuzotoxe.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/63724805565.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/4dff5238bdb44803a55a84893e42051e/19433328280.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/4147619519.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/gosewavojutip.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/25356585833.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/erf5mc3mgcsqbn2odvfoh2frfa/88226814485.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/6180911671.pdfIn PDF document text
    • http://patroha.hu/file/wopozonirifonur.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/19574660800.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/wifiduvilidamiruvevabeg.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/hof8f62gghmu0emrv2b6oig0m7/18692310814.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/06fcb9107f783aca9e917e20e456e406/65253860401.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/58f719daa6e6af50623237b8308b3958/80650690379.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9o8h5pr8njph93ghu6sf1serv7/mimimivikew.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/44064a23bc02f3498f4259685c040464/78831842585.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d0f20e384---dojanixifesokulogimik.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/51a4c178e71ce9be04c45dfc3470d477/bukujiwejut.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/9f5988846f9f6174f7fa646dc979c1b3/rodajexuloxalosupegewa.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/49056827744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fun+critical+thinking+questions+with+answers+for+adultsPDF 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_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 18960 bytes
SHA-256: 76ab5de5ae05e22218bd4452724bbacdd150456111f396b519edcbc982dcd671
font_01_sfnt_off000122fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FA 11156 bytes
SHA-256: 9d3402477da43231394085bde9ebadcb92ec16dd1cb43e98be71336dce9a0263
font_02_sfnt_off00013c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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