Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c1e7861c4eda82…

MALICIOUS

PDF

85.9 KB Created: 2021-06-26 06:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fabf7cc416c4368fd28495f476ac7ce0 SHA-1: 3b6709ad619114dbd0f44b039898e47e7113ebfb SHA-256: 15c1e7861c4eda82748b5c682b0e777c7ed0adbe696dc85e71618e74e7a07dcc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm, with URLs often containing UTM parameters, points towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://crysiq.ru/uplcv?utm_term=off+licence+store+near+me PDF link annotation
    • https://moto-trend.cz/public/files/fck/file/getexajipoweziw.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/vekewodelulik.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079f56e33aaa---52287015729.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/348c2c8d3007eeac7c6add945808820d/22348828534.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/3c1e7146e801aec3343b8e5f1c42d284/xutasujuzode.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/de48c77a2e4ae8bb31135b77c090c752/28197701119.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/8bbedf7ae2629898cf634a1b4d7955ed/93916407731.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775c35b4a0c---betegik.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724ebf23041---komimomipatazixinodezeza.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/1161333841.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/l2c046vkk5n1l3i0evq85pigga/xakekix.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/refuvupazunozakowaxudisox.pdfIn PDF document text
    • http://strandedtattoo.net/file/xidabojegomumemunor.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/73533485414.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/aa722b281acd7dcb2ca43a80fd8389f2/dugamapubeseditale.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b012a64466b---jupefovujatebowavax.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/e5ogn27eppkgl4nc37fv34vu42/24375494506.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/zivital.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/53525280290.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078d100a5590---dobukejenewu.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/lakuwutumadapus.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/medozumimataremitozatinux.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105162149.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 10520 bytes
SHA-256: 422e0d2e59e02a78b6ad2402211bcd06a3a3fafbb8c802de21419ccce4714a29
font_01_sfnt_off0001051e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D30 17316 bytes
SHA-256: 7c93205a3a9c2af221b5e49afe25bccfbcac9b056fc12347a50158c1a0f0fab2

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