Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff2b6fa7264d6c0…

MALICIOUS

PDF

84.8 KB Created: 2021-09-11 04:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: de8959f6e8adc5a5e630ac35686b5e2c SHA-1: 754e01a4f7100e189a3d5e0fbaedcdf25d06c80a SHA-256: 2ff2b6fa7264d6c07dd83938c3f115277deeece4f441a1faf32a87cb8436ded7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing pages or further malware downloads. The presence of a 'Download' button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/5475a95a1f655aecd78c2f7a3b3662b5/56271096488.pdf In PDF document text
    • http://christopherdallo.com/file/kemivafibibep.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/milam.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/18468932243.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/gulabufamonipaza.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613372d7bb45a---mitutuborutikasopagemu.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/77128071268.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/11800896024.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/waguf.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/17263765732.pdfIn PDF document text
    • http://lejuriste.ru/files/file/59307704323.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/12410423890.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/vokorutop.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/c64ijkd32o0bms7co8q9aionq1/67698825242.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161358e54d5b37---wunavoxodejuvabugutagol.pdfIn PDF document text
    • http://gysanya.com/upload/file/21090421092267838544gzok4417y4.pdfIn PDF document text
    • https://inks.bg/userfiles/file/buxipenivopikazakegawuli.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210903085506.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/vasadidunadugipisezexi.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/gesevij.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/51440444778.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/pubevil.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/wizigidibunini.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/60142076061.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/zubobuwotirefoji.pdfIn PDF document text
    • https://ambalatender.com/upload/files/wajil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=chakravyuh+full+movie+download+480p+filmywapPDF 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_off0000e5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 11392 bytes
SHA-256: 7b225190df01483804e9e732220053ca7b2777dd01c4551ff22f448d1a305efa
font_01_sfnt_off00010086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10086 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11898 17404 bytes
SHA-256: 4c6fbccbecf73f0ec7203656b9e4e95a3cdea46a7cc6e0353bbfeb66b03dcfc5

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