Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e8ea17832b2a84…

MALICIOUS

PDF

95.2 KB Created: 2021-07-28 02:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 1e0c29e2d1c0ee6f44152ac391750aeb SHA-1: f10fcbc85fa3f144db9951c77d1453be8bae536b SHA-256: 03e8ea17832b2a8439209c85eb2bf4ce927e9118b8a7778f21e23efe26de2d04
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://iccarrentals.com/files/file/85928752045.pdf In PDF document text
    • http://lowchens.org/userfiles/file/zorasebojomiwode.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e9ccd09ee---wukek.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/2d1fc0d6ee058c9d1ab3c3e42451d879/bevegujoxitiko.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/pimozapitipotupibo.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/40371052220.pdfIn PDF document text
    • https://airshow-bg.com/file/13096310873.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/qj8ggsncoojbr2pd7puk5u01td/67652498916.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/4061389803.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/xezegezaxibasim.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/88755893980.pdfIn PDF document text
    • https://ka-base.no/images_content/file/46336761886.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/26518009425.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8cbd1f071---59918585846.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c9ab78e2c---29666526873.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/bcba06825f419a3a35e266f47f066cb5/naluli.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/kufaleboguraweva.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807255b642a---86032433873.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/65271176959.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/4559482720.pdfIn PDF document text
    • https://mnlex.it/file/nemutixedinujodoja.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a05ec18b6---78873010142.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/2b2aee126e293bc5b7a3aa116a0d768d/nowexad.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/28056937520.pdfIn PDF document text
    • https://kaisar168.com/contents//files/47457072531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=asana+rebel+app+for+macPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
font_01_sfnt_off00010e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A2 17708 bytes
SHA-256: 90e8ed2fa89f2b762e5d8cb3d4335ecfae6f83932a25d9d097dec204dc5860e6
font_03_sfnt_off000154aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154AA 10572 bytes
SHA-256: e59521296cee072cc09d0620410448fc6bae255a52661f02a33e1e212733c7cf