Malicious PDF — malware analysis report

Static analysis result for SHA-256 972b5645efc8639a…

MALICIOUS

PDF

115.1 KB Created: 2021-09-05 21:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c48de014608f8b12eb86b17857611895 SHA-1: 4c0bc776f4e429d030322453b5c6aec912700d08 SHA-256: 972b5645efc8639a0943deba752e111c85e99fe2c477908085ee264ee549f321
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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=linguistique+et+colonialisme+pdf PDF link annotation
    • http://studiosimonepantaleo.it/userfiles/files/vozujoxutanadarena.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8ed949c06---45539444019.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/98554109359.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/fosumolil.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/1c3ba403d83013eb4c2db8c4ff11e437/33138467884.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021082104545973499.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/69951056072.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/tufepubebok.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb9d375e22---xonafumazotok.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-12/20210512103817302419.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021051417351416573.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/64293698405.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/kimiwewazinef.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608994cb9fc80---30180086178.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/711534b4ab3dccac19e22fa544dab75a/sofemovose.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/fodogolesozoduzekatima.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210618203318_1aj6h6.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a68c9e6b93---30105984624.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9835024987---82382649850.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/54598090358.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/61577210279.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e71ad8a069---berezowavaxe.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/b6b6983a585cb4946297253c6e19227d/60329050270.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/5308678119.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A48 23936 bytes
SHA-256: 42b381ab5b759c8adb316a487fac5d109781c5eaa099dd23841868a315497772
font_01_sfnt_off00017678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17678 16316 bytes
SHA-256: 8c636149dd42b336259a0e46a4285c6acef36ea7e5fefe8109e179c81aa76a28
font_02_sfnt_off00018cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC6 11064 bytes
SHA-256: 13ce2e7b060c3ac1ead5d182515755c68cb0af4d17a1f870a9d9c58189b151ba
font_03_sfnt_off0001a601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A601 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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