Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc02d5463d3e2277…

MALICIOUS

PDF

83.7 KB Created: 2021-08-20 02:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0acb282ee77f1f0e1e01dfbb1212a0a SHA-1: e699d8af3f87d664657f816c21cb9988a2cafd38 SHA-256: cc02d5463d3e22776084ca829c62fca9565a5e6d02d97bee78403df231f22079
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the URL analysis and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/41633443225.pdf In PDF document text
    • http://mikllc.mn/uploads/files/16124921117.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/vowawupafipafekosapibu.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/34741294485.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/jimikapogalezobono.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/deaea00bbcf754e7b6b759377dffd4e9/rubuwifagetejawurikifabum.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085a64b4a25c---mozab.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210528221954.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/xobirumewizesosidol.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/nerezoborezodavemejemi.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/lidimigawinumopema.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/gikolinironinuromog.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/93222529764.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/99138820707.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/zigirasosubefileb.pdfIn PDF document text
    • http://teakdeck.pl/files/file/mukevufajoreraba.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/42499756547.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/7838263052.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/19125240963.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/bazifip.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/94067537643.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4471c599bc---65753713538.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f617374e371b757cf38cafea2278044/gudeburiru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=jacuzzi+jet+pump+5+c-s%2FbPDF link annotation
    • 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_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10788 bytes
SHA-256: ae0104b3d76695da0f6791e18ff282b0eda6dc74715188df2b15b91eea5a2ca8
font_01_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 16620 bytes
SHA-256: 9f929d487c3633e002648bec7d2f13e1fdc8b0fd42e9a09cbaaab419ac14208c
font_02_sfnt_off00012951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12951 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1