Malicious PDF — malware analysis report

Static analysis result for SHA-256 be678a0e97b296a9…

MALICIOUS

PDF

134.0 KB Created: 2021-06-26 10:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e0dbc0388e6bcac250db14e7bbeea4b4 SHA-1: 067904ad8c25798d85261da77e6952f0e360f43f SHA-256: be678a0e97b296a9b71aad7ba51c6b010bd334ea4279357f6a1ba6a05acdc285
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and SE_PASSWORD_ARCHIVE_LURE heuristics strongly suggests a phishing or malware distribution attempt. ClamAV detection as Pdf.Phishing.Trojan further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crysiq.ru/uplcv?utm_term=taylor+swift+first+album+cover PDF link annotation
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/p7d9eo3btte6hu6eg11fvgssjd/mexak.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d26e0ed506---vanomenojijutitaje.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/zojurufinusabotoxuzebiv.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/vekujuzafapumuve.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/41df3a26f9ff1b81419855d4777455d5/93066811932.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/22ddaf80b36e4655819fb1556d7bd224/tedenolilaxomon.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a5df3cf893436f0a22ede73734b61be/rikogowokexafuvivezob.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c41896166a---39795034375.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/80538754948.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/sspk1k86mvqtlo72a3o5fig39q/64441097236.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/lifdk7p3q3nb2cisqr1ra2n8k5/firuzowemigubul.pdfIn PDF document text
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/1dhf73v9vqdiahipcvr130ucf3/poxigilizujutazaze.pdfIn PDF document text
    • http://merwepizza.com/upload/file/7697673786.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/63065078885.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/676f33639a6cc1820bf58198a5deb5fa/tutasa.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b7376b689---sazusifovefumi.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf27e4b9c9---wapifikugum.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f6e7cf912---tojovoxopibafonajin.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/4nnbmor1rvt2hb0jb6qipvqfps/losapojubivafisejumemej.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a89ec378c---sogibaju.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c1e34b60c98a6b54ccf44d77661c5f0e/jufege.pdfIn 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://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_off00018db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DB0 19968 bytes
SHA-256: 5080c0697caec289799191e9d578109635fd0af1107755e24fa8bcc395698092
font_01_sfnt_off0001bfbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFBE 6636 bytes
SHA-256: 90c6c60c8ca7e1944fc85ec300dee82bffc862e5f2ebbe1281b98a7d71c39880
font_02_sfnt_off0001d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6D8 10860 bytes
SHA-256: a97a745aa0e419bfc5e7ec7189639f51b81d4776342609bef4f9a18b39b222da
font_03_sfnt_off0001f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F022 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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