Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e4a9b607e0f59f…

MALICIOUS

PDF

74.4 KB Created: 2021-09-18 16:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a2328df4c71ab07f5269720c5bf09be8 SHA-1: c90980a17e84b8a8716b643e3ca4ba6b6ebdb800 SHA-256: 14e4a9b607e0f59fd0c61de7c3b83b91f83513b827cd1a0e53a625476d4ac112
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous links to compromised WordPress upload directories and disposable hosting sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=mytv+online+apk PDF link annotation
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613082df551f4---gavomirifisisopaket.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5afb55c6d---kuwujezanepebunorusozitef.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/83513253500.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132402441509---51701153006.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/50209123034.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/24673948698.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340d68e7302---7276605173.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/82009716899.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/87ca479a6d42321f18efdd0220101beb/99370162313.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/tutetuzog.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/fopejijotaravoxakozaviri.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/satuvumewekibajesukeram.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/22888641138.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/momufomefegolezajuvudov.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145734193656---jasifavelev.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/91686745695.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/wanodosaredefosowe.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/tejevamusipudemisuta.pdfIn PDF document text
    • http://susutour.com/userfile/file/79515338231.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///lajuropali.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/vubivoxozomunexegefer.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/remesedawirimorekekemijax.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/0fa9dfc6fed60247d0e09f64a17fbd9d/10927875400.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/eedac8312a8cf6e975d115d2ca6e86f2/59466486922.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_off0000c18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18D 16476 bytes
SHA-256: abd6cc908c0b3a5917adffef76072ea3d1242214af7a84b30ffb52b17b2cff71
font_01_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 10244 bytes
SHA-256: e1941c9d5b75555f9cef34b0c2ccc3434a8aa3b34a671f3f09c99a247692c29e

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