Malicious PDF — malware analysis report

Static analysis result for SHA-256 deaec792d3fb6f17…

MALICIOUS

PDF

90.1 KB Created: 2021-07-05 15:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 18abcadb718e40936653bd193f38ecfc SHA-1: 5c8ada9007db07c944bca962c346106890d90fd6 SHA-256: deaec792d3fb6f17b58b659f76b61d6af06867199959e5c68946eb196f0c89bd
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The document's structure and URL patterns are consistent with a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=explain+the+various+elements+of+promotion+mix PDF link annotation
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606dff5e5238b---61084683512.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/gaxebusubadepifejefeja.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/4b9b20a2077b9e9b068b1a30663fcde8/xadudemuva.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/d961592d817250cf4f8a2e4a289ed6f6/66124493065.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfcd44c706---73383022870.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/q354iko3u3pketveeii8hg6sep/wazevisexuridi.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1528eb9e28---nojeni.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/bajizamonupev.pdfIn PDF document text
    • http://palami.by/images/file/kisukagobonozerivurel.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/42763765572.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722af3672d0---23055785589.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/75041209526.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021051700422673499.pdfIn PDF document text
    • https://computerzone.pk/file/63386358165.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abcb46e2f60---duxugazabigipunuxanesuje.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c5cfa97f41d926135f0da734f6a2befb/59292854792.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba92825fc19---tadawupelemipuzorojew.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/21467733671.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/2ca26885d2188a53a25840e94ea37a9d/mumasijivazik.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-06-24-10-28-07-CgiqTQVy.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/b6779dd353acb24847ca7d30b8eb1f8c/44640993472.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210608_C84E3B6091C6D45E.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

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_off0000fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD55 17136 bytes
SHA-256: 25fd92e55b5f0beb4daaae4f399b546acb37b1d3e561099428f431e054c802ab
font_01_sfnt_off00012a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001422e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422E 10872 bytes
SHA-256: 109643e9207c4f8caff0b82b0b260a279881101dba06a4a831d2143e5fd82296

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