PDF malware analysis — malicious · 727f1087a3e84491

MALICIOUS

PDF

74.8 KB Created: 2021-06-28 11:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 5a0014c9cdb2554bef793e631bf7d3a0 SHA-1: 6746d59b3450c62735137f39489b8d252dcbc9c0 SHA-256: 727f1087a3e84491b15d2fa1b2eedbcd5fe597f7c84e35c9412dc6a0320c6ff6

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs that function as a link farm, directing users to external websites. Several of these URLs point to compromised WordPress installations, indicating a potential phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

Nyx PDF Classifier suspicious score 0.4683

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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
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://irlanc.ru/uplcv?utm_term=why+is+the+earth+named+earth PDF link annotation
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/ac04c7cd8df9491ef354e9c56b9d1eb4/23048655179.pdfIn PDF document text
- http://trunglam.vn/uploads/userfiles/file/70569182241.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8a6063033---suzulude.pdfIn PDF document text
- https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/0a5opkf3aj2oqhso0utn4tjor0/88934280384.pdfIn PDF document text
- https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ubupoj2epove90hgarifrpf252/gisutegulesakide.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608902c6de50c---79772672067.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608067417274d---60385747547.pdfIn PDF document text
- http://doubles301.jp/files/ckeditor/files/tupunafigafovetukiwafuga.pdfIn PDF document text
- http://nhasachnguyenvancu.com/Images_upload/files/71824410285.pdfIn PDF document text
- https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/lebivowabivaz.pdfIn PDF document text
- https://zabulgaria.org/userfiles/file/75602079231.pdfIn PDF document text
- http://stalmost.pl/userfiles/file/lepimorabefilevuze.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab874bc901---lumosepabasotufeziduvin.pdfIn PDF document text
- http://ks4073.com/file_media/file_image/file/pixokal.pdfIn PDF document text
- http://allnatureint.com/userfiles/file/xagorupezonurozuwifo.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a5495431c8208381b95963e4b8c811eb/19034565400.pdfIn PDF document text
- https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/dgvg2bodisdn6c3h13v68ii861/44241745171.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/64dd141f953bc80a469c0f57f8ec6f84/96604320450.pdfIn PDF document text
- http://lamachine.nl/userfiles/file/18140962309.pdfIn PDF document text
- http://hnc2.com/userfiles/file/35891023041.pdfIn PDF document text
- http://tubietelbar.hu/uploadfile/66637197101.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/63571713506.pdfIn PDF document text
- http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e5a29e21e---tijudoforadorajujore.pdfIn PDF document text
- http://valeneighbors.com/userimages/84104929333.pdfIn PDF document text
- http://amphorabeautyclub.com/campannas/file/fomexavoratejo.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e5fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5FA	10456 bytes
SHA-256: `5b60000a4971197d5da6f1f8aafa0a9ac9df81b53ed64c0de3334e79542747df`
`font_01_sfnt_off0000fd89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD89	16952 bytes
SHA-256: `56155abe8eafe3008110c99d558d03f5bf551a9fa56be1582e50a5cef795292e`

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