Malicious PDF — malware analysis report

Static analysis result for SHA-256 866aa9fc21980d56…

MALICIOUS

PDF

75.7 KB Created: 2021-09-20 08:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 059119ae837a1dcbf9413701fdaa73e0 SHA-1: a8069a7c4cc60886913458d758992892214b7f7c SHA-256: 866aa9fc21980d5631402de26a146128962271f93ef51e1daacc2fc4b955698b
156 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. The file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The presence of external URIs like 'https://crewmak.ru/uplcv?utm_term=download+minecraft+apk+ios' indicates an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://crewmak.ru/uplcv?utm_term=download+minecraft+apk+ios PDF link annotation
    • http://www.tiande-global.com/ckfinder/userfiles/files/29395122164.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d24c6cafe6---7622030667.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/tobomitobafiwatuzugu.pdfIn PDF document text
    • http://vakaruinzinerija.lt/userfiles/file/vijikuworuvetufupunosu.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c268c236994a820730641e12bb86b70c/34606095097.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/wezinorojuzupizi.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/74548630883.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f326abc458---ruruvozudib.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecf30a56a9---kifefesexig.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/genopute.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/solexuzoxomokogod.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/relaw.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/76056465231.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6d16ebde6---95054255909.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/gipufikax.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/2932l0a5dkqrl7tjogimo87ml1/33477570034.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109151646481291.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__6130300CAA3E2.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/22969307264.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/tazudafifuzonuri.pdfIn PDF document text
    • http://xn--80adib9cjd8a5e.xn--p1ai/i/upload/files/jularagas.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/82742472855.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/57761581501.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/zonoj.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///53826566936.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/76969127117.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_off0000c553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC553 10960 bytes
SHA-256: 7438ef61a8c54817bb08e0ecaca87d7f08aaa20b61b295a3c96d72ef45231ce3
font_01_sfnt_off0000debc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 16472 bytes
SHA-256: 6acb0f3d0ed28f93bfba6d7172223bc67e4505728cb24bd9e1f58a1f5750e753
font_02_sfnt_off00010935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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