Malicious PDF — malware analysis report

Static analysis result for SHA-256 933466453ae1f1bb…

MALICIOUS

PDF

82.8 KB Created: 2021-09-05 06:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 472e8d24f673f589567d7fd6391ff108 SHA-1: c71c637aa32ee8312f02ce94eaa1055e9799a5bc SHA-256: 933466453ae1f1bb2bf973fe3f7c8bf73fd1e0d6cae455501015f0735ed6c0e9
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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised websites and disposable hosting domains, likely for phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://allytemp.ru/uplcv?utm_term=ccie+security+study+guide+pdf PDF link annotation
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/930f9a86690d937702748a0948ef576b/terozapedavu.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/69427465111.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/wevubawuxeraginukajoj.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/131291bc4427ac66ccf25ef0e4b60894/46001010279.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/27920109100.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/vudozazajufokigerakibusid.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/96640560112.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/mlojbqd3agb40opvhmr0tdhl66/21839176864.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/miwoweniponitog.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/gokinesew.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/3d2448a315b81f7b794456331a29edc1/97967866742.pdfIn PDF document text
    • https://emprenderem.cl/files/tuwudinewigusetaxitalok.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/05a75dee05f132da222e2c0f204f7c7d/rovoxiv.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/pixamokovuzenu.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/49112571316.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/78821292362.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/47733186071.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fba988847f0---81592775603.pdfIn PDF document text
    • http://geodez.com/pliki/file/12117236652.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/i1267kg698ficoofthak2dpq85/pezexamotulelideriwifeda.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/bokijolidel.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/039e5ac7158cc856b7720c8e38644314/30334675907.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/megefapulizusiganujagoj.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/bikofesonupakuweded.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/9e1f6f8bd71eebffa68fad6feae42aee/sasefafuwunamaxisemona.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/dakudebodetudo.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/aegvihmdlajpue529k6qgl0k9e/14828840275.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_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 10608 bytes
SHA-256: cadb45523e3a92f7e5775f59e6de60c417be3aee43442346b86d6aad3fd1025b
font_01_sfnt_off0000f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 17808 bytes
SHA-256: fa17cab5c9093c3ed9a77e4be8d604759d99d1a023f7c677e1d1c67e8d700548
font_02_sfnt_off0001253a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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