Malicious PDF — malware analysis report

Static analysis result for SHA-256 b127027bddf7776c…

MALICIOUS

PDF

87.1 KB Created: 2021-06-29 02:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2c8a67af533fc7cd923c3231a27c8dd3 SHA-1: 2b47857bcca414f6d85aa0e9497cd62a813db9bd SHA-256: b127027bddf7776c67d743f039229523feb9ce797d4dbefec52dead1b1ffd301
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://irlanc.ru/uplcv?utm_term=diaz+brothers+scarface PDF link annotation
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/fbf92dcb662af756317401c1430b7c68/likukaxiruf.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/89104640760.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xasovewijexowajera.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/2326861704.pdfIn PDF document text
    • http://staropolski.net/Upload/file/8800290894.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/24733596454.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/76441464360.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892950ebd49---59024698946.pdfIn PDF document text
    • https://medtek.vn/storage/file/26570900606.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/e3265954ac58622b53b44e99081ca796/zorosorovov.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a72a70e98cab04eeb65949fdefe8b262/fozosesixasagobiradulibi.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/baf6e1fa1c5f0e72122eef298179abe7/vezadixijatonezok.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/hvi2uuqd7nv1hd0rhsst6lg58d/49527593812.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/wafose.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ue3c5p8cghvn1chtin1u9lqs1k/zetofazo.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/afit3lvk2oqhmc5lrqaisjbcn3/fedakukawuner.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b9be5f588---65935997700.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210619_152233.pdfIn PDF document text
    • http://www.centralperdana.com/file/21832063245.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160734d6dc527b---94931474077.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608be7f36fcd5---jupasajeziduvagezonadu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD489 16504 bytes
SHA-256: 115b418de671664b2b2389805d710068f6007e4508dd5a97e03637cda0987e5d
font_01_sfnt_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 19296 bytes
SHA-256: 6e6f9495633cc60f193e6586359dfde1afddbf0a04bc9077547bb5dba0355f38
font_02_sfnt_off00011d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5B 10484 bytes
SHA-256: 3d5644884bd53ca21d3cef6a828cff78c683dea47821973f7ed7338733cab92f
font_03_sfnt_off0001356d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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