Malicious PDF — malware analysis report

Static analysis result for SHA-256 80230b6c5af2f395…

MALICIOUS

PDF

103.9 KB Created: 2021-08-30 12:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7b894971b015125d0257b0fb9770e9a6 SHA-1: 3e98c7945b3d69b37aaa4f5cb86839578c43c2b7 SHA-256: 80230b6c5af2f39500959a0865eb05d045a1edc449a910c750f5b6fb003e57d0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress upload directories. The primary function appears to be redirecting users to potentially malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/5151bd0513f706817f3a7a5e7675c592/ropaniguligif.pdf In PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/f04fv7rgvsp3eibnkhdvtgm4ci/53760126420.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/82434947815.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/41487574948.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/9b0c500391523235f15941f912428c2b/kazepeti.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/58007285837.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/60081102802.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/buvuwujosudanopanexiw.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c1da7e24b---76268025873.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/vajufa.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/madimolerojiginavow.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/508404792.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/mt2ks8i82gel03sjie6f7ovsb2/30376996489.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/makewepoladujig.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/wawurinubeke.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821ae82d3fa---puwemijuvijatamejifibuxi.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/29a0c48ca42cc8ec5382d9b58328c4ff/guxas.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/viselodekijedutekoja.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608080ca050c0---dadesaderag.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075111fb1abf---wirudipap.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097415c8d86e---kezuxugezijikanul.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/rlhvovq5p1h0gkt2p8sl6etcr3/dojafurerenoxiduzabazux.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ee2f08d01---gijosudikozodesokig.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/jarupofiliraninud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=statistics+for+business+and+economics+14th+edition+solutionPDF 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_off00012fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000147d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147D0 17556 bytes
SHA-256: d72deb245ea96b6f5b6a4ab00daf2bc7ca66df1436f290e5cf984fc142f28f70
font_02_sfnt_off0001754e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1754E 11184 bytes
SHA-256: 3a05666e24a53a006b0db2c2796eff9070eaf650f7cffbdf9f878c00329fdf16

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