Malicious PDF — malware analysis report

Static analysis result for SHA-256 17eaf97ace2c12b4…

MALICIOUS

PDF

94.5 KB Created: 2021-07-29 22:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2c3e8a2f3fb664693eb6207e0e05b57e SHA-1: 75e4ca4ec1c95a8e64a0b5ef48fbb6b9396d3211 SHA-256: 17eaf97ace2c12b4ad1078e2b2f7c6c0f2329d6394edb9f4214362de77658c97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly supports a phishing or malware delivery attack pattern.

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://medvor.ru/uplcv?utm_term=wwe+2k17+apk+mod+data+obb+files+for+android PDF link annotation
    • http://fredericjean.net/oplusco/file/92905312574.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/553ct4m48t8157jjo4dmh8o8g5/55937352884.pdfIn PDF document text
    • http://transfertrolley.cn/d/files/44220889804.pdfIn PDF document text
    • http://ruresept.ru/files/file/88413334360.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/7ddddd7c837d0cb853c77b8f6c60a9d5/sudopevipeluriboz.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/22644801825.pdfIn PDF document text
    • http://svx.su/ffile/file/latitixudevuzag.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9f82e5741---sijibesonujifuvixogikukoz.pdfIn PDF document text
    • https://tepihtrava.rs//files/11804494339.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/36122662204.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///98604387422.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/vasogetuwopamulotaxemajuj.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/257769a33e4e4518ec598e200ad6e06f/38172016541.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/guminaru.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/puxopupodorebugulenorujo.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9dec330c0---sogunada.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/20377237391.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/23e7f1bce11c44e8d0d623870c35b728/73800609762.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160811e351f1ee---zivobivekosigitavelafax.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/vugovo.pdfIn PDF document text
    • http://maisondequartierdespareuses.com/userfiles/file/mudaxadof.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608670208e0d9---zemalite.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/d0afa1f6abbdb9874f3d8ee97a9e48e0/detowesebanadumunubupir.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/sgkgm1bteof2togvsle6sjn3t4/49211425936.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_01_sfnt_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 17428 bytes
SHA-256: 137795423001057caef919034f0a15bbf4fee11c53d3c2c32f9917d03b1628d5
font_02_sfnt_off000120a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000138ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BA 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_04_sfnt_off00014e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3A 11192 bytes
SHA-256: 963bc65c5c1cfe15462f90e94cdf1b00affd93e6b786db1d656b969c17cedd15