Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0853bd68a00fe3…

MALICIOUS

PDF

92.2 KB Created: 2021-06-09 00:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 192341d6d40aa8ad95332956cd54c2f7 SHA-1: aac96d33eb31fea0373664bd8783bad9cd6f9ed2 SHA-256: 3c0853bd68a00fe369f9b57f6385f29d79182b1588e18332a65ac737d5925abc
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The embedded content, though heavily obfuscated, likely serves to disguise the malicious intent of directing users to external URLs. The ClamAV detection and ML classifier strongly indicate malicious behavior, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://infrive.ru/uplcv?utm_term=hypixel+mod+for+minecraft+pe PDF link annotation
    • https://artbynela.com/uploads/file/92674347397.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/waniburorujuwo.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/93319045108.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/totejobezufalakin.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/31724766041.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a621b6925fb---71929792798.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/i65ib6iublve8amsq95higtecv/vaduvefazofit.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/2d5047d01fca6c302b4cebde9a9993f3/xerit.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/vlvqnk7059vto1rmovsv6amio7/batasifunofek.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/dm4f46tf12d9k3ht6rnas3ul3q/89340327431.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/mukimukipesuj.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/tupexametimopa.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a6db2310fb8---kulof.pdfIn PDF document text
    • http://meta-min.com/files/jadasumup.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd96580718---59475082550.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/9f946048b10d2703d993a9c3a6d4ef81/duragupezepekovuximuze.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607405088ef32---bexet.pdfIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A3 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00011397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11397 5256 bytes
SHA-256: 2af5fcbe789ea7ae82692e4b336271c275bf6777a9c8582c7b7c57efa6a1f61e
font_02_sfnt_off0001256f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256F 11912 bytes
SHA-256: 361d7df5c6907896469925ce184c3c066c79a72524d5fb0bbdd47ccf6e928bff
font_03_sfnt_off00014dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC3 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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