Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06546c4e77df6c4…

MALICIOUS

PDF

79.5 KB Created: 2021-09-03 23:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 39e220d74c159aad51ae235089c2ac85 SHA-1: 68eb9240ec275a4e2eb1873347fda44d98b86e1f SHA-256: e06546c4e77df6c4fc409872d046c6f3a6f8ed90a4ee50046ff90c7507cfd038
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/53523629927.pdf In PDF document text
    • https://steklo-shik.ru/userfiles/file/15114095508.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608886b385252---23595817157.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/tagazopufoxeku.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e89f11cda---9715315258.pdfIn PDF document text
    • http://stonebreaker.at/36071218665.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/3cfee9c50db5fbac09e87f8a50c3b1ca/6419016269.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/9fde5864293cc9d82b81c09391bbc218/vivuwozoreweb.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/46404732205.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123772cb9440---muvizozewi.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16070bc918ba21---sipemazubet.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/gowazebivoze.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/92827124671.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/latisoza.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/nogipurobelenaru.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/klnlaqb32ms6vrtc6tb6bnjgr4/zomabozemetetif.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/xitumotujirizulewi.pdfIn PDF document text
    • http://sdds.be/userfiles/file/puxibu.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/94852095019.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad02a341616---mezeve.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/76371513211.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/vililol.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/kapukalirate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=joie+gemm+manualPDF 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_off0000d203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD203 10176 bytes
SHA-256: 9b02a917dae4a31e0b6ec3299648e5ef48ee5257df6a177356cc461aad1c18a5
font_01_sfnt_off0000e8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BF 18320 bytes
SHA-256: 29cbdfae593323f3f3cf0e863008a4b64687e3a0b53759f56b981ac9860c463c
font_02_sfnt_off00011881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11881 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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