Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ca14ecb6f3d80d…

MALICIOUS

PDF

91.7 KB Created: 2021-06-30 22:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 533301335869eb7ec68bf5d87f08d25f SHA-1: d0c4f932cf6465fd3dae93a54c43166df9539749 SHA-256: 63ca14ecb6f3d80d8c38223c07ecb7037f13f1581b6cfff50a5325b5df1f7ffb
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. The document's structure and numerous external links align with techniques used to lure victims into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee0ed8e595---paxevofana.pdf In PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210625174527.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/dba9ee0b5325d0a4cf93bae286f1b2ac/jusajijalomexeniritememuz.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160954852311b1---foporitukumajidosu.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e9092f369---fabuku.pdfIn PDF document text
    • http://palami.by/images/file/lawuritokikudo.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160987e30347ef---277319640.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/mezumujujajujosazolo.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/vabuzamuvidedezu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609024d8944b0---28891668975.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/93986545852.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/f2hokte6hq7u1e3kcrg84ho487/55319596746.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/3dc9b0f606a1cb7d43bcf8b869026eb7/87128269366.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/pivaroratubutufizipawom.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7206614e3---nulawuvesa.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e5e894eed---gizabu.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/kixedive.pdfIn PDF document text
    • https://menu2uplus.com/images/file/dotipowafop.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/fc125746ab0ed666c3476ff302c105ba/509058163.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b5b002dcefd3891b99c0c70663cfbdc/62167820127.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210610143347.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/d17f31a9d2eb27da245e5c48111e3b9e/61873758659.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/51933611980.pdfIn PDF document text
    • https://lonnebacka.se/anvandarbilder/126/files/33912871697.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f9da1f2dc---21366663006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=difference+between+solid+and+subsolid+nodulesPDF 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_off000101e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 17748 bytes
SHA-256: 247a6ae76b7c592f657aac31b5397703fbae5d8211518c9fdeca090101eb3c1f
font_01_sfnt_off0001300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14826 10796 bytes
SHA-256: 3aaff7e5de3fbcb3c0f8de3c34fe3b521cad792fcbf382b8ff5325ada250606c