Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14aca62ca291b6f…

MALICIOUS

PDF

85.7 KB Created: 2021-07-25 08:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 412e5cc85613d0422e39d6c366db18f4 SHA-1: ee808835b49b9fa4396d04312cfef94b363c40b3 SHA-256: c14aca62ca291b6f75425895e03e4b91fa320e2da196fc1dd4b7ace29867e195
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, identifying it as a phishing or trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm nature indicate a likely intent to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://iaetindia.com/ckfinder/userfiles/files/puwagemojuru.pdf In PDF document text
    • http://mosjob.ru/images/file/megebitujezeju.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0472b4841---60359318478.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/43587364743.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/fb1c632ff146f4a44b4c5743ef4365be/kovakodalibi.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/vudozogukudirititi.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a37a9d0723d---bipivuwadirub.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079720099edc---48583175866.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/0pj4tpip9urdl261gn7g8d9vg6/69393320122.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/nuzofekokewutoje.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/iq7vl0atudtpnh0ev766a6lrhd/32397075036.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/pawopisukimok.pdfIn PDF document text
    • http://myqself.com/upload/files/zojizefelo.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/88358870895.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/74739249049.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73fcb2588---kaberuxulopuvogumekuze.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/68147040998.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/xazilex.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/36248c75c51835439b8bd618deadbe8c/jufazazofemimabaromi.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/88768601246.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/td868rifoqkugq2b5u50tiof64/79108608446.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/42076442765.pdfIn PDF document text
    • https://irantruck.ir/data/file/15639081611.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/48b8ed477a4abb49922cdaabc0e7b50e/nepolegedewogaxima.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/bkjka3iqudap637h6grrnugvu3/wivuzikakofiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+is+the+exchange+server+name+for+hotmailPDF 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_off0000e942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 17304 bytes
SHA-256: a7af18f386a7fe3ad3867e5c1ea1fb7b572cec17c767bc20f187e800f5d52fec
font_02_sfnt_off00012e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9E 10944 bytes
SHA-256: e45e67202146f85d0368e86bcda21067ec1208aa40e7905e76ad5fdc141b670d

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