Malicious PDF — malware analysis report

Static analysis result for SHA-256 f262b80cd40f7906…

MALICIOUS

PDF

79.0 KB Created: 2021-09-11 15:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e1a59707f6927f8b3d725411d411a580 SHA-1: d0d07bac9ac7ebdeb6489cbce3676a9477e7f370 SHA-256: f262b80cd40f7906fbda7630a921b156724147b41ea6b687ba892378e60a26a1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://nolimitscenter.be/peausitive/images/FCKeditor/file/rasetukesonap.pdf In PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/rivujukukorijogedofiliroj.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-1/20210901170903665753.pdfIn PDF document text
    • https://emenu.hu/editor_up/99090918011.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/nudebowuletukizubevo.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/21607972322.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/zixaw.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/40021822081.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/gexenitu.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613789b6b5e07---vozafegigibevito.pdfIn PDF document text
    • https://spyboarcams.com/files/worasuxonoxuvogufoves.pdfIn PDF document text
    • https://jobtiara.com/files/files/badikagojijegixep.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/89208526558.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/39927454175.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/kepupukasedikilelugate.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a104f5805ef029b50c2ffa2574c9b787/gabovigevi.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/86524242657.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/bogekufaturekanur.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/82661744344.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac79425276---gowise.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613540fda0d28---86538424109.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f41e63baba6e994a1b4d1dfbd82c1878/84777333778.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/60931491553.pdfIn PDF document text
    • https://tdfstore.it/file/97568160111.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/11085862739.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=el+gran+libro+de+solidworks+2da+edicion+pdfPDF 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_off0000cb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9C 18804 bytes
SHA-256: f96500a1f2aa07ffdc9518c40c49d5d63d2daf2eab889f11e854df1358ad8bdf
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001148f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148F 11120 bytes
SHA-256: d9efb8865159c22c6a5e9f95116d226f18f664e035eff6e65bbe65b928c92fe8