Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a72ea003a90fce4…

MALICIOUS

PDF

84.5 KB Created: 2021-07-05 06:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fc0c71ba27273d2522d43a7b7807d1fe SHA-1: 6adab3c7f851f1395c21765da02afc86d198c0c4 SHA-256: 1a72ea003a90fce4b389fbb9a74faae773e9513d1a7bea660f9ed6bb2bb3a791
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to domains that are either compromised or appear to be disposable, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirming the nature of the links. The document body was unreadable, but the heuristics and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://greathorserider.com/ckfinder/userfiles/files/rakopumobixig.pdf In PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/5n7b1slshbqvks3vopi35o1he4/populefanedonamizezenalew.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8234cf9cb---gusev.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1625260152bimokej.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/24786858448.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/a24d4a00c72505dd0693752892ddc844/dunasebirowodamo.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/dapazur.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/biguperenowoxet.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/4ca536efadce4812489377b9c09d398c/fixafexajif.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/r23ouf4qtnbfa7f2hiv58hp7m2/pitiv.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/14236455714.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/dasigovivosotutogiv.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e60b7a8a79---tutefinamidigixudekufari.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/biwigekikipuxonub.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/7b65uh6f6gte2a4alp0665sov3/70676719363.pdfIn PDF document text
    • http://1970lions.com/clients/5/57/57eb30a5877ba0c7834658d164206012/File/roveragapativo.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5484e2d96---koxameforujinalozeneliru.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/dtnoc80uscfnnnmp4l67khgpi9/52389069043.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0637e823b---31494301738.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/76503051601.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/padonajalisa.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/29290782249.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/65048824381.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ce62c44cd54---17865472563.pdfIn PDF document text
    • http://apsons.eu/files/file/xevutagijumariwexowabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=causes+of+bad+mouth+odour+in+childPDF 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_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 11012 bytes
SHA-256: 7ff9c39c7517b3c58d8c6d7df07730228396d022519dfbad1eb2661a17765e6b
font_01_sfnt_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001199c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199C 16596 bytes
SHA-256: ce6b4984fb8005e53e91b60e8c1e90a8f495faa0c5ea9423cae8d12fe3f784e2

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