Malicious PDF — malware analysis report

Static analysis result for SHA-256 482850688346febb…

MALICIOUS

PDF

85.5 KB Created: 2021-09-04 04:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b9331567c3552a692516f9cee2738da SHA-1: 46798c943d0ba922fdf157145dc8179b21b3d801 SHA-256: 482850688346febb473a9ff83c969aaeddeed7dc316668e93bd6b95c3c0bbc3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable domains, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://infrive.ru/uplcv?utm_term=como+alinear+los+chakras+pdf
    • https://10glazsikeyrosa.ru/file/91787530175.pdf
    • http://aitrans.org/UploadFile/file/F1202105301419463658.pdf
    • http://dralituncer.net/userfiles/file/5543364723.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/716203b550185d6b9906e7fe1395bda1/54489154171.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3v3vo9do923lae2f5c79jjl099/14909431033.pdf
    • http://atthaya.com/file_media/file_image/file/24973549292.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/90a04f6ae139dc1dd6c952cb2176ea2e/vagafetakekizikimokas.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfe33b5423---balijetulekipubo.pdf
    • https://acryl-bg.com/userfiles/file/vozufulonedab.pdf
    • http://bjxbw.cn/userfiles/file/12692791178.pdf
    • https://bednidhitraders.com/userfiles/file/83573425000.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e086f7df40---jagawexizurebofuxujov.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082f60f05482---14954609068.pdf
    • http://abnig.friendship-match.com/upload/files/ledadid.pdf
    • http://foto-klub.dk/userfiles/file/desoturubowajimamus.pdf
    • http://nhadep30giay.com/uploads/image/files/fakuwapetilojavuputule.pdf
    • http://polyacer-ecp.com/userfiles/files/20210812_080538.pdf
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/9e607e1a0a1bacf98fea428738432627/darinakererali.pdf
    • https://hantverksakuten.se/ckfinder/userfiles/files/gotuviroxumimalomujoxi.pdf
    • http://krikrik.ru/uploads/ckfinder/files/jiwuli.pdf
    • https://cr2tek.com/userfiles/Proj_Name/files/pimerosewutidegunepos.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b12075dc48d---85883806248.pdf
    • http://hoanhaochemical.com/uploads/files/nolerenivolu.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69b375f60b---lomudipegebapojelusudag.pdf
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/menemetenazojevuduzu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c1.bin
9528a06df8e5e69e2cd41fa13d50b0ff2d6a2ede2eecca65801dae0ca013cd15
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 19208 bytes
font_01_sfnt_off00011766.bin
170179a140e73e0e30da275aac528f38214e4e2f9298bf430da7a98c51713e32
pdf-font-stream PDF embedded font (sfnt) at offset 0x11766 10912 bytes
font_02_sfnt_off0001306f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1306F 16792 bytes