Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9c2787446ad5ef…

MALICIOUS

PDF

81.8 KB Created: 2021-08-28 22:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 54e650a856e063b3a3725f903f548127 SHA-1: 8db70762a5dd3bcb744dbfcc03fecafd01f6adf4 SHA-256: ee9c2787446ad5ef448e307737102f8ff550f16183a8d60c5fd83477eb593c20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or phishing pages. The presence of external URIs and link farms on disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://cructi.ru/uplcv?utm_term=how+to+propagate+snake+plant+water PDF link annotation
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abb02e6bdd6---vijimapata.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/56319484163.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/5fqake92d7n2rvcftbdpunen3u/98605539779.pdfIn PDF document text
    • https://digicpictures.com/downloads/39109445445.pdfIn PDF document text
    • https://zold-kommando.hu/files/52500686488.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/pelezomegupadinafesovogup.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/023b9280a7c884e038dcef6f0194e348/82061350793.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce37d04dd0---58397555689.pdfIn PDF document text
    • http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/suruvinusu.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160812fac3b194---dojodolamipile.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/09/file/20210509_080234_137.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///rakerevekotanapopasolin.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/pebifizizekibadovaxi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xumuniku.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/44050709348.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f949756a8ab---jawuzijobuloruxad.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-8-24/20210824170345904585.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/rofelomutajatisome.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/70006814212.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/32445858522.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/90572586734.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/zutesazuvoxolonozetotis.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/72887129792.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/rufujazevage.pdfIn PDF document text
    • http://entiambalaj.com/upload/file/kudidav.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/vemuf.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/69784973103.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/46377894974.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_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 10504 bytes
SHA-256: 719d6079101d82dea54849d2480b1c89e80fe466ecfd2ef8bc5a666ba0fe0fe5
font_01_sfnt_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 17064 bytes
SHA-256: d4c9876f975a207ed81483a2dae854f8b2ee8474574e2143d25600e24b2f86f8
font_02_sfnt_off00012144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12144 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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