Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d3153bfa0226a9…

MALICIOUS

PDF

76.0 KB Created: 2021-09-16 07:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ed7d7773d230cd1c99acd17523cb4fa0 SHA-1: 53b49c1633e9cc9fba91df9f886197d797a302fd SHA-256: 47d3153bfa0226a9057868dd5cce0795d25441084388a6713212fb3aa2a1515f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file that contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://coretry.ru/uplcv?utm_term=weed+firm+2+android PDF link annotation
    • https://medicentrumnz.eu/medicentrum/files/file/60507094596.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16141f39d99b60---60198047205.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/diruk.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/911f8951ddb8d7cc95a190469b17be03/10525819761.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/busagudapiwebirodeser.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/wuxenukipaxofomitoli.pdfIn PDF document text
    • https://topupdana.com/contents/files/24151816702.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/60641355257.pdfIn PDF document text
    • https://5703n1n6999-6a55.com/contents/files/wekigowalo.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/48443018258.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/vafim.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-04/images/files/53982228646.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/64006683197.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/311dcf1fab10c94f545f8196a6959412/wazekituzezikez.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/63177288011.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/donawifamesomawili.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/raveg.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161379b518518b---pedupakutemedabonavop.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/6jh62icsfcl2mi3r1nn4vmfbu2/wanugitogagovo.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210908_8C2A38AF1514920C.pdfIn PDF document text
    • http://wixoon.hu/upload/file/92720182594.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/37183160990.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/mokegezomurelodumifare.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D6 10316 bytes
SHA-256: 30b2193eea8424332dbab40eb7b21dc462e2bf764ae74aa78cff81bd553a03b1
font_01_sfnt_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 16836 bytes
SHA-256: e80bd9768a6a49daf0add38247f5669083cbf9203e9e1a01bfdb01ea45d8c724
font_02_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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