Malicious PDF — malware analysis report

Static analysis result for SHA-256 6289bbd047aab641…

MALICIOUS

PDF

85.2 KB Created: 2021-08-18 14:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: caaf5eabf0f620e188622fbe99b6f7ec SHA-1: 26983c52060d224c9d97acd54bd2ee5cb3982c4f SHA-256: 6289bbd047aab641c5a98215e9febb4311c6e486d9be51316601f47aca9d6021
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/737c4aa0f66d02750b106a3e22ac4a1d/metativul.pdf In PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/655n68c5snl1joc0jm2m0ub4u0/42225907755.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/pijazidaxuni.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/18609789499.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ef03bcb0173d2680f7de56b648772d44/vizilopifabako.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/56895988149.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/491e3ee50a01ec4e5d8aae0ca3ee8060/68887594015.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa3dd6e41c---53191839990.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/womivajaxibaku.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0d24f028e6---xaburipufuzanasisido.pdfIn PDF document text
    • http://unseretochter.ch/images/file/12190929302.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/90837102847.pdfIn PDF document text
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/55015392435.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1c95a6248d436e8568154162b4f0c77/wugujuwewupisonuse.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/39684677652.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/rijepozadaxopuwetijiga.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e0161147c---kuwuwabiziwexom.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/28653917275.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/30719109272.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24a3389c47---bibixamupis.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/jiwetilulibegoribikezafut.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1b50b6f01---sabesew.pdfIn PDF document text
    • http://4yoga.by/pics/files/47106824635.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c256a1c2ab2---62702617905.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=connection+tamil+game+with+answerPDF link annotation
    • 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_off0000e6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E3 10792 bytes
SHA-256: 41137108fe7bd9ea58f3f80bf3e25416b655f21cc2c944e628989be916c43d4a
font_01_sfnt_off0000ffa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B9 17536 bytes
SHA-256: 09593279ebf2dae0ebdd447120bbb0791b4a1973d820fdd933cae8432c6641a6