Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eae01b1388d6dee…

MALICIOUS

PDF

77.9 KB Created: 2021-09-04 00:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 14194e65a19decd7d848a50c99e66989 SHA-1: 567a0e90bb73d43e3b1db1911e87207a7ce453a0 SHA-256: 1eae01b1388d6deebdca4960d2c98ec4bd0a487105e9b3807a3482044a93daf8
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users into downloading further malicious content or visiting phishing sites. No scripts were extracted, but the structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608513ece57c6---keworoguvetetuw.pdf In PDF document text
    • http://presssimayeshahr.ir/pic/file/853180314.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/161260172c4c23---revijefegifava.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d77a73457---85010002149.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c83044ed---76035206730.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d32fcbaaf16---rezewiwowigufavovuno.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/karadedutatowulijedav.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/64910472989.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/31700324112.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/33456162558.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/7353bc11a84759331b8ca55918cf408c/90545465915.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/076706f1a71d09cb9e92c8a661296f42/wewazimezekira.pdfIn PDF document text
    • https://kawanmto.net/contents//files/taliviribabikarogodu.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/21484764483.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents//files/36979973582.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/12496779470.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/navisugakegisakojugifo.pdfIn PDF document text
    • http://fitviewer.biz/files/file/nubuxatafatawavizatu.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/59814328351.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/6387cd29a7e4b03e8c8efc4a622b447b/tixatumarobabodixegebina.pdfIn PDF document text
    • http://generoussecurity.com/uploads/sesawajeberojutikokebakit.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/64903925517.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/bemoxuvumuf.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/2645ffa541ce491daf4acad191687e1f/punerazetidinemito.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/bowerujutesedux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=linux+commands+for+hacking+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 18616 bytes
SHA-256: de398d5781cbaaa162923284b6de247dba533cbb5322a208766f2a9b9feb41fe
font_01_sfnt_off0000f889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF889 11040 bytes
SHA-256: ee3ae8c60dc142b2398fcbfd500d79ac3ccd37afb5a8ce9c4cded2d1d0416dba
font_02_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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