Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5c914f1e419c03…

MALICIOUS

PDF

72.3 KB Created: 2021-09-16 11:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b2ee4e92e77f347e5b8c3af74a91a09b SHA-1: 78eac493d29e33659683347569cd9f7db1e555e3 SHA-256: 0d5c914f1e419c03b0057a7671198848f18546c856afed073e572e406729e34d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to various domains, including compromised WordPress sites and potentially disposable hosting. The presence of 'utm_term' parameters suggests a phishing or spam campaign aimed at driving traffic to specific content, possibly for credential harvesting or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=clean+master+app+download+2018 PDF link annotation
    • http://medicare-darmstadt.de/bilder/UserImages/file/ninarawijobowoziwijuzinis.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329fc19f7c6---fujozokawidabogoberokuliv.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee1340febd---17400953067.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/binakodupotimuletarolox.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/11380915359.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5c2499f09b4d285b8d4d3b57a73987cd/folazapuzemexumipalikosag.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/jopodo.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4e2ca5ed6---kijolezolaxibumenepogem.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/werabig.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021091400585273499.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc05c4c06b---tamivebusimafopineve.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/61676880669.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/3091569182.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-10/20210910040422709853.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/nikojalasobekalopa.pdfIn PDF document text
    • https://jjpremiers.com/files/98439445387.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/0hanf0f5o3bn3c47mqnlesoa6r/21199560671.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/kugulopedu.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131224343f34---muxarugozuwugezarifusasi.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210916150006.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210902/file/16305514883970.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/34663354776.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/degisibopaj.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_off0000b9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CD 15664 bytes
SHA-256: 7456f8aa4dad653efabec3a4c3222ed925ceebc016455b64b8d9c55792d88c3b
font_01_sfnt_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 11080 bytes
SHA-256: 69a8f20fdc29377996f876dfaa050c260b23d29ee0e37d357ac6037b745237b3

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