Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e8e013fe8baf40…

MALICIOUS

PDF

73.4 KB Created: 2021-09-25 12:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 97e45ed9e8be79ce7be378cfb967a503 SHA-1: 513c0da6f61db7acdb192bb7908d03a43d44fd23 SHA-256: e7e8e013fe8baf403f41bee32b9df3e71f686d1be3c0c178ef3466cc182ac34d
204 Risk Score

Malware Insights

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

This PDF sample exhibits multiple high-severity heuristics indicating malicious intent, including embedded JavaScript and links to compromised WordPress uploads and disposable domains. The ML classifier and ClamAV detection strongly support its malicious nature. The primary attack pattern involves directing users to a link farm designed to host and distribute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=call+recorder+skvalex+full+version+apk PDF link annotation
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/30875656679.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1614eab2d93130---pokemidufamisikuvutuvis.pdfIn PDF document text
    • http://synergyproperty.com/images/files/zurojivugukumuze.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/ois67i4n55c41lfrvu672m0r02/nogumusevamulo.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109061320043536.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/kelonafemudisomixemefoje.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-14/20210914103737749664.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/sakamipodedurupavi.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/d7a613052c67bde575743fe2ab223f19/morekus.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/89565707561.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/59647902855.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614893cacc4ee---3998831401.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109060347064866.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/65555894657.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/18024291418.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/kegolifoj.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/47261579085.pdfIn PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/vopifurasonomepufojorotid.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/8568518021.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/pemik.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/17/file/20210917_111035_189.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/wenorapopekobazexob.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/sedovamusuxane.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_off0000b5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD6 10904 bytes
SHA-256: 290a0ada4faacfca444a3241f6ad640b2bba27f8832e26b1ec80cb9c069d00db
font_02_sfnt_off0000e72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 18196 bytes
SHA-256: d83d2aa210df5d2a77cbfde5ae42c714c9f97805bc714f34b553333755a778a3

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