Malicious PDF — malware analysis report

Static analysis result for SHA-256 54322f12446a8ca2…

MALICIOUS

PDF

109.0 KB Created: 2021-06-17 07:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fff6db9ced78d950ea7a08a035550245 SHA-1: ad5bc2c36255960a1f06e6ef62df6dea065c8b0c SHA-256: 54322f12446a8ca2ae359a367667eb580b6b606e676c52a1d7cba31f3483bc3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external URIs, many pointing to compromised CMS upload storage, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, appears to contain search terms, reinforcing the idea that it's a lure to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://allytemp.ru/uplcv?utm_term=xenoverse+2+how+to+get+super+vegeta PDF link annotation
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b30de939b91---gebagisefe.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/531ca145a7d763e841e0afe8d404481f/35022353146.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/wusimusakopegudeleno.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f085226042---zebolafubo.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/67853204760.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/28470890717.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e54953a5a633aff4e36c4481ec13fe11/kukefiwu.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/78c143bd4ccede249a8368f403ea5113/1650840134.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/5693c7993b887b6dcce18609fe493053/fagerutejukiraxapagofetu.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/zalef.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607abda12760f---gemekepokufanilanerel.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/vasemoridotarobevofevikef.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb7dc20768---27689972985.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160821bb6d83de---41756353954.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6fcc5d975---71806662178.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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
stream_003_off00014369.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14369 13556 bytes
SHA-256: 73fef5877a4eea4ea9eb53d77ce351c41f3d09ce71bb0846ea50993729b2d184
font_00_sfnt_off00013153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13153 5308 bytes
SHA-256: f3a972c6dff0f1c963fcfc2da1a8f7929b22b26c64dfd8e40f61e729831562c5
font_02_sfnt_off0001693d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1693D 11836 bytes
SHA-256: 84591993c3edec4681982fb38972b4c76b5a8c347ef225b5a073c482ff32424f
font_03_sfnt_off000190b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190B7 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b

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