Malicious PDF — malware analysis report

Static analysis result for SHA-256 7449bff045ea3a29…

MALICIOUS

PDF

82.4 KB Created: 2021-09-16 11:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4bd2dc03ccc21fb2e458d92e2b47548d SHA-1: eb3099b43ef41398ea4c10ea1d34299071fd52f7 SHA-256: 7449bff045ea3a29f57cd9e6500de0c193c19f86b56b027a10c60be1e3b6502e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farms pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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=terraria+mobile+full+version+apk PDF link annotation
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/15117968655.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/xubowuva.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/gorebukaxogogizulologo.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141b437a34ba---paxosivunitukegibapipof.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/junarubitumozasanamemu.pdfIn PDF document text
    • https://aspart.ro/ckfinder/userfiles/files/xunirezurewoviwezaweguke.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/87618571285.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/faxigipoviguzigitugigotu.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/67731733395.pdfIn PDF document text
    • http://bushurov.ru/images/files/51220320092.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/wuzusoworexalo.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/xetidutowolazobegimurok.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/safefasidosulunigofidekiw.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/95183313010.pdfIn PDF document text
    • http://sgpeo.pl/users/file/38233694992.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/72086157457.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/27ae91d8a72c76e9a13f8274880359b1/mijofexugalerapasibamibin.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/kowuxoxadefafaluvixeruk.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/befekititig.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613faf90cc4be---88413739265.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/67758189183.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/76416239963.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/gobukeselulofolupolo.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/80424638794.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/redadalivubulituz.pdfIn PDF document text
    • http://thegioicamdo.com/upload/files/loxetokaraxitavurukudi.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_off0000de83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE83 10784 bytes
SHA-256: 347082c9e15d22f4d31f5f7989ad9152cb6047d66613c93c0193191c394423d0
font_01_sfnt_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 17104 bytes
SHA-256: a0779b35a0047b155b99e9c042ae13922ed79485a56a23f97d964ac554915db4
font_02_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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