Malicious PDF — malware analysis report

Static analysis result for SHA-256 004052eb6053e662…

MALICIOUS

PDF

82.1 KB Created: 2021-06-28 05:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c11eb5414f5bb6d457f08a0d18e1156f SHA-1: 43bcf7b81d22f0875d6c403d730be07836b7426a SHA-256: 004052eb6053e662f0681a28ade1ec6495b07b146c8bf4c5fbd9334d81ba4288
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting it's designed to host or distribute malicious files. The presence of numerous external URIs and the compromised CMS upload links strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c24cb1da1---57868955658.pdf In PDF document text
    • https://ancoraeducacion.com/images/59782931153.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/34323594589.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/bedidetexo.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/25766485693.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/aadf76acb5b00f2578665dc4a70de024/65766353789.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/237d9c66b6df1f7b1c6d89e0ccd4fde4/22092338844.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/mufuz.pdfIn PDF document text
    • http://soles2walk.cz/data/file/89419053998.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/263cfae1caaee1019cc55b37a9aad1de/45928734529.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075fc6a2e1c0---30730083324.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fc4009e57---69934907540.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/gatenip.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/eut46jkesvrd47riufetgc0ob2/97445061600.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5cb5be686d30974c8c1495ff67cd43cd/77557319986.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796c4974da8---jokaxasifuti.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080999e98e41---1785217422.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/23528311528.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/72ba208456e54a7471fd0314fdd6fd30/sasupipixupad.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/b0b99a6919ef1692adfe69be2bb3dd58/rugedufidarowoko.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/74039539203.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/lalizutalirejajanajoreti.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/kakokurudilas.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8fd2a34772---xodimotanixed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=3.1+understanding+rational+exponents+and+radicalsPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0A 11084 bytes
SHA-256: 7d3daa55836cc06b02472a9d4a2674753b787b0c49d6a29438c35e71a7da6f94
font_01_sfnt_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 16428 bytes
SHA-256: 20816a6acf9f39c51ba9699d2618cc20f97d3982d3112855b46590d25b4a5828
font_02_sfnt_off000120c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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