Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0ce175504daed6…

MALICIOUS

PDF

84.3 KB Created: 2021-09-03 07:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 00cb3ee07923e1f5930a78bd61cd2a6b SHA-1: 2d67ca1e1a2e547a9aa6755d97acf45eb35a55c5 SHA-256: 1f0ce175504daed6b8ab350b708e01b23fa303a45e8472b4fdc4a21eb67d6f0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs pointing to various websites, many of which appear to be compromised. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting an attempt to lure users to potentially malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://coretry.ru/uplcv?utm_term=crit%C3%A9rios+de+light+derrame+pleural+pdf PDF link annotation
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdf9656bf7---zabepuxaginir.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fff08fa11---73206691876.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c003991e19---53529576770.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/36589957419.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/mamoki.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/beladaxipin.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084b44d679ba---84113022209.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/65313843235.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/24922076444.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/23327563359.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/32lbf7tn6o93mja3i352rjt9d0/mezufaduvaxabaj.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/sililojanivunije.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/9c97192bf211dc5ed3f9ecece96569bb/61712748751.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/nkgr7d66gtrdk2sen0h5srut77/lowasedugex.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/sodojigapakepanuv.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609271128ee20---vepapodovasolulosejago.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/65465472608.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d6fba0740---1785357142.pdfIn PDF document text
    • http://mp-journal.com/media/file/luxejemanunuzu.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///jiderujawopifonebux.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210515020242.pdfIn PDF document text
    • http://tfforming.ru/d/files/121200262.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/92885372724.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d0b16d539b57c71142c8ad390be2809/wovunu.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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 19632 bytes
SHA-256: 4dcb928978aca4861dd58910c1fc06812f93719bf41f9ae7f8612bbcc587a9dc
font_01_sfnt_off00010f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8D 11124 bytes
SHA-256: 9fa2ef9ae3ff7802dd1b3dcdd846c625bc0dc49cd4b6a72e80c28bdfef496c73
font_02_sfnt_off0001290b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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