Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd135aea3bfb9ff…

MALICIOUS

PDF

81.7 KB Created: 2021-10-05 10:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 88905df6a23f26790c5ab01838d33189 SHA-1: 512c260d28445248e72e43b28be6cd4d202f43fe SHA-256: 3bd135aea3bfb9ffc2d09f119104eb32c65b225a2c5cd9390ced635a01129ce8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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=pokemon+fire+red+x+and+y+cheats PDF link annotation
    • http://ajtoablakcentrum.com/_user/file/49249767358.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/pavifilebulove.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/15449502877.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/59519249136.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/79022967316.pdfIn PDF document text
    • http://elfast.ru/userfiles/file/45506332367.pdfIn PDF document text
    • https://fobh.net/userfiles/files/97198091833.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/19e5e33c1c68f02c9763eef1a129b194/11515061633.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210903/file/koduwise.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/3918064756.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/latobagalenubanesomupemap.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/lotolabogasip.pdfIn PDF document text
    • http://okvin.org/userfiles/file/bewinipidajasagu.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/vazatesupijitapopi.pdfIn PDF document text
    • https://wsbtitan.com/images/file/xoxabasidiveviwisi.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e8e8536ac---sogupiwof.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/tapepixigefefodipivipu.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/vesaxun.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/getinebonoj.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/sivopufonabugemupiresupa.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/6aac4e90195a377cf0a11c6aabcae802/vobawezotasirebesogipuzi.pdfIn PDF document text
    • http://inercial.es/uploads/files/62953398822.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/nosogabagisazebala.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/gagusajiwumin.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/pubokigalujaliwi.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_off0000d5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C6 11004 bytes
SHA-256: 0780f8ae0d2a963a75d730b765f19c9f43513f3e337a4f161aebcd0791609ede
font_01_sfnt_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 18884 bytes
SHA-256: 8c82b0cdea23077f6b3ec92e2fd5f849fc04063e03e791d69a7ec7e39ea4f488
font_02_sfnt_off000120f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.