Malicious PDF — malware analysis report

Static analysis result for SHA-256 2663b1be4f497ec8…

MALICIOUS

PDF

82.4 KB Created: 2021-09-08 15:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 31821d1b2aa9602b202a92f581a3db9a SHA-1: 06a950ee57806e1c1cbdbede93bcc9939dbe7411 SHA-256: 2663b1be4f497ec8797c5c1b4b3de7af97e43dbc423025a6a668fdbbba43e110
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms or using disposable domains, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://venusnvs.com/userfiles/file/57077996540.pdf In PDF document text
    • https://kawanmto.org/contents/files/81885132479.pdfIn PDF document text
    • http://bushurov.ru/images/files/94344333051.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffbcb887f0---vobuwijanexerives.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/80021572198.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/papiwamaveru.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/nuvosuvanutigavojuvezeb.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/vojofanuresan.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/turajalisa.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ca0fbba0c---tarodawabuzanaduli.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/84412389001.pdfIn PDF document text
    • http://exim5.hu/_user/file/magozemefuve.pdfIn PDF document text
    • https://koratspring.com/upload/file/46447111425.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/12090958681.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/81120405970.pdfIn PDF document text
    • https://hiroyoung.com/data/files/21157552698.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/suwifa.pdfIn PDF document text
    • https://ip-pharma.net/data/files/maravetavo.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613409ecce58c---fetipolekowixofap.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210908074835.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/85785984098.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/58254eeee94f8877c5349b25cb6a4160/886902878.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/xenoniwukivaruki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=ingersoll+rand+t30+compressor+manualPDF 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_off0000dc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7E 17656 bytes
SHA-256: b01ea1402b23c0b5997651237591539080f0a5fba720ac5f424eb57b7adda955
font_01_sfnt_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12275 11108 bytes
SHA-256: a052e2f738eded7c3fcea18b6d519b68a8201e5078e617630b10dac977f4bd4c