Malicious PDF — malware analysis report

Static analysis result for SHA-256 117cb9fae71e5469…

MALICIOUS

PDF

85.5 KB Created: 2021-07-02 23:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 43a118338df68f32e819333b8a6c5c63 SHA-1: 817b57f33cf5cf72c1aa44d020d6c38264d85769 SHA-256: 117cb9fae71e5469939194f3df419e08aeb791ade4f3981b4ba67fc5e72845a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The file contains a link farm pointing to compromised WordPress uploads and other domains, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs further supports its role in a distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/61971dc2687c0e71186340be9eb10675/66769096630.pdf In PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/44868916783.pdfIn PDF document text
    • http://vodnik48.ru/content/file/88094432326.pdfIn PDF document text
    • http://guchenes.com/d/files/fugigew.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b86ae11b138---28041727026.pdfIn PDF document text
    • https://mollis.rs//files/21959009125.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/94816080600.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/nekozulalubidosikifofaweg.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/45947571484.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/14667694461.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/53210514039.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072e44e8d8f3---lakenokerom.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd3e2cee21---94275720478.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f9cabfae3---morafopopokowiva.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05ff91efb9---nofunebitofuwenuzapekaxo.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/71bf3826751d52532f3461ab9581622f/21666445530.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2716e6abb9---duwuxojisom.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d814ede4c08---dazamalazijuvuroted.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210525014825486.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/jeregavipawaladebexiwa.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/ef3c48539952713f00256d3603702577/zuwiguvego.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/imv81mcermps6arlulasl89qdu/dejijumoropopi.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/f1115ab1f04563741832359159ff8948/lojamavitewitizizeze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=forex+cot+report+analysisPDF 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_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 10560 bytes
SHA-256: 501aae473b806191748a2874109acc1532445fdcfd142fc0cdbbc760e459c2bf
font_01_sfnt_off00010508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10508 16912 bytes
SHA-256: 6cda779fab0ba57537d2f5694d607881329c9e098f5ac285217114a99f100e2d
font_02_sfnt_off000130a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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