Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59eccfa6392d214…

MALICIOUS

PDF

75.6 KB Created: 2021-09-04 06:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f06fd2d7b24780f55d59fc3f480586b9 SHA-1: 4d084ecf69fff8025e5ac2e2c33260a9a13c2a4b SHA-256: e59eccfa6392d2148b932551a20f1bb62ad1a431707f14fdd6140bfa91a8a192
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely serving as a distribution point for further malicious content. The presence of embedded URLs and the structure of the PDF suggest an attempt to lure users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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=aj+hoge+mini+story+pdf PDF link annotation
    • http://architects-desk.com/uploadsfile/lufopikad.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae7929b5f1---nusivedapekasunenowerove.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/55113530797.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/6797425313.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d10bd073---jazipogokigotodumibanulo.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/40763284b23a3ea5909e5e3b57e165a0/najod.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a789761e8fe---64405640711.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1611c708bab04c---49926867001.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/43d469c1328bb2ad8b0ff1ac05863514/moboritepifiwurixij.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/xutinerubewakesu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f51e5c91c4---wujebogawodapekefod.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/vawax.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/43756503911.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1621893772.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/49323090095.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b72ffdad44e---nitejavez.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/21892564237.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/wonewikezoxe.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/r54a0mrlq8fm4obopes615slio/vubaxo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e3f86af20ddb2c5e2a6e333e508cbb03/42262729175.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/82355167797.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa71c2ce6bd---3948097278.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/luwasubiwabud.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_off0000bffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFD 17548 bytes
SHA-256: 235f51e88996c7344fb4cffd1be5db931f37167dc4291fce2a0d2da18082e9a6
font_01_sfnt_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 10964 bytes
SHA-256: 9d9bc1b6f0e77d90562cf91c8386003a064fc92812bc1bc72c63807c538088f7

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