Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e558ad3ede0223…

MALICIOUS

PDF

84.1 KB Created: 2021-10-06 21:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 556cccb1165a39f7c5f847105a50fc99 SHA-1: 85500db595e4d14de72fe44e9e53b7e63d8b661d SHA-256: 44e558ad3ede022347fa821cd06fc664e5cc097426d951077ca54b2fe5365628
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=get+along+with+you PDF link annotation
    • https://toolsatool.com/userfiles/files/31093558307.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1d3c2cc33---kuxokanaboxeborakun.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/95656249360.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/ae2ff0b9c3a332f0d5c02595dbe3b78e/44630751614.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc82a99713---mezuvemulabi.pdfIn PDF document text
    • http://online-cycling.com/files/file/lukuzadipa.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/zofekivijon.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/62904469809.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62393043038.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/26120897989.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/kunegibarosafaxifezifer.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/wexisumazu.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/73135362899.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/niweluluwuxab.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/lixujupipew.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/55711498944.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/zejoxunebefan.pdfIn PDF document text
    • http://oilspecchem.com/files/senutub.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/f3b56b23bb587a6e6b7e6c69ade12f98/11452846389.pdfIn PDF document text
    • http://silver1979.com/upload/file/47428375331.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/xudararonipujuxugival.pdfIn PDF document text
    • http://ultrarelaxedcbd.com/newerac2c/userfiles/file/88985614816.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109050327369902.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/vukatulalezej.pdfIn PDF document text
    • 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_off0000e083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE083 18532 bytes
SHA-256: 3b494cd9b3af36cf37576e2af93963bb6ff2c56d895b52c4f711b6a016cacc94
font_01_sfnt_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 10456 bytes
SHA-256: 07d6976cb74903dd95001c3b42b7b622292d386b17038b477f36d024a89b2f21
font_02_sfnt_off000128b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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