Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eae7545a403e251…

MALICIOUS

PDF

83.8 KB Created: 2021-09-07 13:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7e8f6e713d7f92afd865b308cc2483e0 SHA-1: 51f4cc9db81eaae15be3a749032a4db7730ef602 SHA-256: 1eae7545a403e2519daab3be82be9d55f4e2b79006b7bbe90182f2ffa5b5643b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on compromised websites. The presence of multiple links on potentially compromised CMS upload storage suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/1cce1ad3385fdc43f5ce9cc810601227/vufekenepatonorebog.pdf In PDF document text
    • https://inncredel.com/uploads/61080240289.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/14126489109.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718ca6eee9d---78193334483.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/oa1gotufd89k0qdo4ogtfbh5i5/24276101814.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a726d520ea2---77362119717.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/1872f874520b23c2e926174ec083a8f7/44445313940.pdfIn PDF document text
    • http://tarasovfabrika.ru/uploads/file/togumivizonivofaw.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee2f88e2a0---43295124355.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d6e0afad194e58a167966beebd2b7dd3/45446664625.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/50414842713.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/52935183204.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/28748320600.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/vunuwofeveva.pdfIn PDF document text
    • http://newmanclassof1965.com/clients/4/4a/4a7b3a1a0fb21659e68ac19badabb541/File/sapumugutada.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160884482a6384---94537752123.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/34092750919.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/zovovej.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/1639796901.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/mapejukezi.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/fafurixisanoputinimogan.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160846e137824f---fekowu.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/58665522488.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=swathi+weekly+magazine+pdf+free+downloadPDF 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_off0000dc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48B 11204 bytes
SHA-256: 3467275af073cc08b9990b194c29be0abec5074f85e430cde441a5069afab21f
font_02_sfnt_off00010e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E78 19700 bytes
SHA-256: bd47034620c9b5d47d83aeb00678c3a32f83c48fda5ecc49426fc332e80384a1

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