Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc100873045ad283…

MALICIOUS

PDF

77.5 KB Created: 2021-06-13 08:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d32a04795450f1b50df5dc2b4164e984 SHA-1: 788dae7ec9b790018d82fdc3d4d57fef9b7bdcfc SHA-256: cc100873045ad2832cd01201ab0074b170e495561166102710d158343a512214
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains a link farm hosted on compromised WordPress sites, directing users to download a "Quicktime screen recorder" which is likely a lure for malware. The embedded URLs and the overall structure suggest an attempt to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=quicktime+screen+recorder+download PDF link annotation
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a232125c344---62738270340.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/rejap.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/a0e48543c59ac7df0503f189e16b96f5/rezotigomokomimerodif.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086415b545ca---kopul.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/64399794055.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/d881bc55b27ba9631eb6235073e30504/kupisomusuzujulaxifara.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/92eb6b0c85c7e131e35ebf6f8e5661fd/gapezulodupaliso.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/80086976884.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/worebixabikakobi.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab8d1f8f5---53204586593.pdfIn PDF document text
    • http://petrduchek.com/files/gigusibog.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b01dda9f984---javuxubefipuwexumoz.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/wanababo.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f44bd497e---82822656197.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/8eed6e6aa7a372098414debbe1301e90/92159761174.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/eb6ad207962a3f6e84ff312075518770/newum.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d12466b386---94932073448.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 5184 bytes
SHA-256: 9c6af54ac0691914935486cadccc696af477fe22af351a9e7b18618054996c8f
font_01_sfnt_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 10824 bytes
SHA-256: 4891a748e1114048c0c0fc1a9efb21678b53229ad1c4a434af99e89fb35085d2
font_02_sfnt_off00011b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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