Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe48e2076cd9f9f…

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 21:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 07478ff2511802fe67bf772f5fce88d8 SHA-1: a0a8321edf380590a5a4710e5548def9f8334042 SHA-256: 6fe48e2076cd9f9f865a010aaa62dff84610d7141ce6155ccc4f25e33297d4a6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body is unreadable, but the heuristics and URLs point to a lure attempting to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://74ahs.com/clients/2/2a/2a132ee8da0778863662fd4b1fa251ed/File/denig.pdf In PDF document text
    • http://exteractif.fr/pictures/2/risurubo.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/tejusixixo.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/kipiloxub.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/aa9537c6418e993828727a998a598976/lufinusinidavalaxojujapiv.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05d6e9e88d---tezelubarifiz.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/18eb57be5201c21db2c317caa7d1fd90/wawozenosilan.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ab9fadcc4b---fozolenoronosiju.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/83432324180.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd69749368---lijalujadivugunagawiluw.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/gijefo.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/nodenelibamabojesis.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/jedizovabesatekapizuju.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/zufipegomunozidijub.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a17dc628f48---paromokemaxufowotoganuza.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a20f35aa472---jukimesigagirovavoza.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/ribowim.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/2s12n27clo7lj907n5jqknacnl/70345299301.pdfIn PDF document text
    • http://gchs1966.com/clients/2/2f/2f663f305105093038a7fc4b193dd8f8/File/52922740870.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/49838206282.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/6jl8ovot4hh0mscp35idvkos1t/54006152612.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/suxem.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/nupizi.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/fesojasedumez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=bses+complaint+number+mundkaPDF 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_off0000e74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 16888 bytes
SHA-256: 26bdb06fb661e59ce2d7495432d23999790a6cadeabf06cd8bc712fb7143ad3d
font_01_sfnt_off0001138e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138E 11060 bytes
SHA-256: 38be66c5569edd6ead093c2da2739061282afa79761f616d969b24e3f572735f
font_02_sfnt_off00012d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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