Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3758010b0d3c2f…

MALICIOUS

PDF

72.9 KB Created: 2021-09-20 20:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bb070cc8847a7ae2d7958f995b67aad0 SHA-1: 47898c979c6ac62cf1cebc94c844c33d4ef4df59 SHA-256: 7c3758010b0d3c2f40b3c9469ecd02dc9e8e61e9a9997fb99ab1958fbf8f2d52
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage, suggesting it's used to distribute further malicious content. The presence of a download button lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/71497238687.pdf In PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/tanapediwibipogumolokamok.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/wobudukifa.pdfIn PDF document text
    • http://a899.net/userfiles/file/ludaparilesaxukadegusojes.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/ximujenurixojosuto.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lubedewalebo.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/63241454560.pdfIn PDF document text
    • https://robertbah.si/files/file/piperunuwovovavubor.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e235fd0c87---bejud.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613e88970c863---73795720719.pdfIn PDF document text
    • http://midel.me/userfiles/file/71972622374.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/27998582055.pdfIn PDF document text
    • http://schokozentrale.de/idata/saxenezujofetazefox.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210903081430.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b4deaa1ee294cbce7824183cd095f6e6/tibalawa.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/13483207143.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/53181176628.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/wekilotaf.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/zanib.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/dudafulixemowatefekurime.pdfIn PDF document text
    • https://mytopics.it/uploads/file/14878572313.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/61496848772.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/89202796607.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/b8on9thtaqg3f9qlictk8682vo/2638360954.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/retonaru.pdfIn PDF document text
    • http://bit.do/fcr9wdownloadIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=john+wick+3+full+movie+online+eng+subPDF 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_off0000b96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB96A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17C 16608 bytes
SHA-256: 2c677ec933a8559e3daca30af7f6b5204773c0a3e65b827e432ca2f58e459163
font_02_sfnt_off0000fc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5A 11072 bytes
SHA-256: 5c46c35aea344a5c973f818da9e5db2b917f99f99d28aa9ec39285179ed14838

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