Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24996c2d981ae9e…

MALICIOUS

PDF

85.0 KB Created: 2021-06-26 00:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: faab630dbe173594cf96a21fa350a674 SHA-1: c290cb7fca0c2d36ce598ed78b6f096743d8678e SHA-256: a24996c2d981ae9e28bc4df38250f36d591a3ed6db7eebfc48d9467f2ab2fbac
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URLs, many pointing to compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external links suggests an attempt to redirect users to malicious sites.

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://oniceh.ru/uplcv?utm_term=miss+you+2 PDF link annotation
    • https://burgas-remonti.com/userfiles/file/92792051306.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/6025128168.pdfIn PDF document text
    • https://daismene.it/file/semisamasuvosedufoga.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b20833a7560---97736298647.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/febelo.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/13b2rcgf1f4vhja7m8ra9utls5/naxovawotanuxur.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ee35c66bb62ec6eb7b2b2bf62680bc54/fawowodaxenusopegifu.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4541c9104b---nepimapopefidalasupubis.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9546dd8f0---vonivisoduwigobiv.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082851dc1042---likebiluxunubenunarave.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/wepujuwulunavuwozi.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/7388964875.pdfIn PDF document text
    • http://fitviewer.biz/files/file/82149525619.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210528105834130.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4bd59c886ba72f4113514c7c6be71d68/51916956620.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832fec1cabd---83133110629.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/68567292561.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/b8c6r4e2m2a6jpi5o0krtgg141/34690786501.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/39467415651.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/23874390958.pdfIn PDF document text
    • http://xsjprinter.com/d/files/redaforadal.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/46209012157.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/69938676143.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/956478de062eceb5195e07e95a340705/lisunuxupokalisu.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_off0000e898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE898 9784 bytes
SHA-256: 10c5d1fb99ab67fd759a03ebf25f05a0d2d9f1105fb03ef782d28bd2546fa9e1
font_01_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 18132 bytes
SHA-256: 778bcefab6f5d5f29c6a440111a0dad2cb2fc4427bb6aede2a3579d5301239ec
font_02_sfnt_off00012ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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