Malicious PDF — malware analysis report

Static analysis result for SHA-256 79780ad20194b59e…

MALICIOUS

PDF

83.8 KB Created: 2021-09-17 22:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ceedac0853487b0c2925c6d79a9c6ef SHA-1: 2bb30f1bc4dc518da3280d2076d1db06174083ae SHA-256: 79780ad20194b59e8d41515f8496211d0165fdd2e1c23c432860adfdce2d2b0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://cructi.ru/uplcv?utm_term=whitty+mod+apk+android PDF link annotation
    • https://www.ftha.org/admin/ckfinder/userfiles/files/ruvogeduwivaj.pdfIn PDF document text
    • http://boxethai38.com/upload/file/vojofifisasudegopizijow.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/bofimeliji.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/76569923830.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/86871971349.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/613ed82134d38.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/6b5e5d5884d69451bddc8a42f05d65f3/81147184059.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613864a27aceb---15187875375.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab3d5ac9c9---ranogowalamawawaba.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/82999571429.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613baeab233c1---duzejanosivepolebu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614033d2c8f62---23413487996.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/50686946434.pdfIn PDF document text
    • http://lsmtrontractor.com/upfiles/file/20210903113824.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/71737640635.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/8448782908.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/6e5e63b3c22e26edae17d8863a6cd25d/nipodonemexavufor.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/mavofevirigepexiwumunev.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/5a283c3c23eb80aea78a50bdff2fa2e1/89643046969.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/upl2ccnmdd6t35cdelgg069r7g/kutixowedizusik.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/valovinovosonanome.pdfIn PDF document text
    • https://mahae.hu/files/files/mepaxinabetejabojilu.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/60890405848.pdfIn PDF document text
    • https://cakkue.com/contents/files/41712405232.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/31292501438.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_off0000c35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35E 22724 bytes
SHA-256: a3f74e922969ee031b171e0bf74d7db5e24298b29697ead3fc062f7cc88144d5
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 10508 bytes
SHA-256: 5154964aa6bda7848bf8e2f79f40a92230155e1afec1d5d8e9e5ae50408cdfae
font_02_sfnt_off0001131c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131C 16132 bytes
SHA-256: 071bac7a3a90310621307d68123817e30fba7c89f9e5021c4391eb43bd8b9137
font_03_sfnt_off00012893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12893 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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