Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb586b7b0300103a…

MALICIOUS

PDF

87.8 KB Created: 2021-08-06 13:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a236aee2a9a9d5dcee75dc92fb574b8e SHA-1: 934bb9ab5caa56c899e93494d53612c004d53180 SHA-256: eb586b7b0300103ac20e314f0bd84bcdaac8b07dc803524b1f5dda362096caad
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites, likely intended to lure users into downloading further malicious content or providing sensitive information. The presence of multiple links on disposable hosting and compromised CMS upload directories suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://weifong.tw/fckimages/file/fugexokete.pdf In PDF document text
    • https://bepxuyenviet.com/upload/files/dozez.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d235f5f5c5---47787568237.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6ac6c361e---75242259915.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0080e80c8---11869245661.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/669f469d346335c607678922b85a490a/mivujaroropakebexe.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/97814337840.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/dorusesuparuxi.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/beguvofonigowobene.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/54022149939.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/kikataxiv.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/75438636887.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/59157027211.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f57b980f3---dewogaperinetududujunelup.pdfIn PDF document text
    • http://juha.be/_files/file/wulusevutedudi.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/40096082577.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c45bed6811---78238065922.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/puvikimatapofokisalap.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/nusavibapunomazipem.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609439152525c---pagavawomige.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/7hmk8f8b4t5sup3d4qk4jvsps5/15094976307.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161024856bf0a5---48305881502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=kettlebell+program+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 10608 bytes
SHA-256: ec340b1112baac084425b04283fb1ded4b9cd4a9ec3b9f8134574c256a492c2a
font_01_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 18044 bytes
SHA-256: 4859adacde45fb9c8ab6a54511efefe62b53a59704799cbce5820e87902680d0
font_02_sfnt_off00013826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13826 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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