Malicious PDF — malware analysis report

Static analysis result for SHA-256 2386233bf15b0f7f…

MALICIOUS

PDF

89.9 KB Created: 2021-07-30 02:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa79cc0415cdf2180e0aa7e25690ec0f SHA-1: af78297672c5795ea627b7a035c2a49acded1d24 SHA-256: 2386233bf15b0f7fdd44c725fbcd5a842239eb53626fb9d157dd9bc0363b5668
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The embedded URLs are designed to appear as legitimate downloads, such as 'how to download minecraft', to entice users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://graciaindoutama.com/kingkong/userfiles/files/lugijokifubukosavogutigez.pdf In PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/romufapepigowupuroj.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/d0a97fe04b24958bfc0755442c77786f/lomakikufowizibelu.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/dbc8475535245eb44c62dc07cca4b8a4/wejebobekibosufutemodir.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/4702255d338d1ed7e7bb540486a590b5/92121671210.pdfIn PDF document text
    • http://tipiland.net/upload/file/79533995862.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/46807922602.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/131fbe4426edd7df9a4f55c48ce3d398/44664173735.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968c0f13af7---53707151538.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/7a760c1689fcaa8e24092d955bc7c0a1/duvokela.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f6d0b8457---34606717988.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/jurisonilisimibufoveji.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c63df1d0b8f---woverifituxejedaj.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/ef4a49c9c897f7a711e9aa9b6cc54f67/91585480479.pdfIn PDF document text
    • https://citytrafik.nu/images/file/makenekobetij.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/omh58p1iure0ddt4rp7ksr0lg7/wuxenajaromajedisevowigib.pdfIn PDF document text
    • https://arerp.kr/data/file///11789973472.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/dorurapatepe.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/bepow.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/e67594e55f95eeb9e3f564dd1f71659f/buxalunijibew.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/a42ahjdr1ogp6a5nnl1iaao3a9/juginefusepuzurafugisu.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/32974692954.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16080f4d426d5b---telosolu.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/91845750961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+download+minecraft+1.16.20PDF 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_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001136f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 16776 bytes
SHA-256: 4bb0ecda4395cc9a0dfec39652530796d54ddab3768fbb0088ed94d4f24aeb08
font_02_sfnt_off00013f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4C 11072 bytes
SHA-256: 4e759e9f124766578884cecb4cba9ee672a4a410c75f83ae04db6d31ab0aad15