Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe01a7498ba43d43…

MALICIOUS

PDF

77.8 KB Created: 2021-09-04 20:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d038f4eaf79bb65d4b0e5ad9fdf6cd98 SHA-1: 7d2c27519ba139bdc70beb91cc0b271918719c5f SHA-256: fe01a7498ba43d431488a34c3cf4ca1ab33a00b77d8a4f1cc900f7f582824488
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The document body is heavily obfuscated, preventing a clear understanding of its immediate purpose, but the overall pattern points to a phishing lure for downloading further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/86880b6c6d5db03c828e68b12f60706c/56805705495.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f10d0913d---nobil.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b783d0097---61768123835.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/09e66cbb86e41eb1290e94368771e448/62821001006.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/2325774716.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098a7d51910b---fuloruxawigukofozirezu.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160af681c4a0a5---29346360279.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/74051677213.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/remolidajew.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b05a5c286ab---18760216233.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/59082999469.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/sefala.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/c7dec45bb18230254d5a002ea801e9ac/3587001681.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/59901304662.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/57973358462.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210520080841.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c92f9ab193---nafezeganazeseputenopo.pdfIn PDF document text
    • http://oicenglish.com/imagexx/files/xezuruziwa.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/nuzotibavapalaxegum.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/79147158877.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/xujofadini.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/23756453943.pdfIn PDF document text
    • http://thebestpearsonfamily.com/clients/e/e6/e6a49a9b6fa3fb0349b1957bd02e8b5b/File/damugigimemebarituboxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=rental+agreement+template+california+pdfPDF 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_off0000cae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE8 10840 bytes
SHA-256: d41ba1f52a6d85c2827589426f360033374b41e50306d77095d8e251b3985bd6
font_01_sfnt_off0000e3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AD 17740 bytes
SHA-256: 4d748ab2120ba8f9fa4e5015861cbe0f2a749cd12c7d4aaaa8d35d132d70f908
font_02_sfnt_off000111b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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