Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e247ec0d2b9c57…

MALICIOUS

PDF

88.9 KB Created: 2021-07-23 11:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1395e9fee702b9e031069e03c6ef9b60 SHA-1: 3ac0314701d103132915ee45fbe084b13daed276 SHA-256: 15e247ec0d2b9c579afd2f0e1c5acc7219b7eddbd0c35a8ad1ca98f1d749cca2
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting. The embedded URLs, such as http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/mb7sfk9inqrtnha9slgm1i98ko/11815998635.pdf, are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9795

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 http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7178010c2---58327818132.pdf In PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/0ee47914009139b3b5576aa1ba833229/bekatapebugebeve.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/b9hk5lnh7hv6ts9elvio440pad/36583709426.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8a5d4b2eb5e19bceb773d9873d6b15b8/40960878868.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160988530c4110---8767179207.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1623045726telaso.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f06e198926e---37902857586.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/faruwikireligukav.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/mb7sfk9inqrtnha9slgm1i98ko/11815998635.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/wopededate.pdfIn PDF document text
    • http://waltonjohnsonfamily.com/clients/870437/File/zusobebudowam.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608941acc3bf2---dojekifekotuwa.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/akqbu3sj1mgnrqir32r3dcauat/47389113924.pdfIn PDF document text
    • http://llux.vn/uploads/files/bifubulima.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/3237267995.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/5f7e02770602d8d51191eda0f3cf113c/66754897233.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f6e3054c8---22384452299.pdfIn PDF document text
    • http://iphysiology.ru/upload/41833258893.pdfIn PDF document text
    • http://domplus.su/userfiles/files/36981047821.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/zajesaxonosixonijorizeres.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/50631951576.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/fawuzejabizepedewapelag.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/2d9de731ffb311b501f3a419260e37cf/84796266746.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837b6e3d365---68757496847.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ffe42dcc27124238f2368a725e37104e/9388198857.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/13799969786.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075532e44fda---33646185450.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=current+black+tennis+playersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 16608 bytes
SHA-256: 57590bf721571fb6a3a127c80646f7953355c7b7a3844da47b43c22e1aa38e1d
font_01_sfnt_off00011bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCA 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560
font_02_sfnt_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C97 10724 bytes
SHA-256: b74829719b26ea66590be0eb036e43ee99ce403c54c2c4d5df03a6fe9cf8f112

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