Malicious PDF — malware analysis report

Static analysis result for SHA-256 47feeab8f841d4b4…

MALICIOUS

PDF

85.7 KB Created: 2021-06-27 04:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: add375b8ec43ef11320185b7e98376cd SHA-1: d89c00cc406fa0e5aaa03de445a917d71698ad77 SHA-256: 47feeab8f841d4b40849e9d7c72c87f18f329e48b25324c0c64a3ca930f6b923
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs, several of which point to compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the link farm and the compromised hosting points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://tonwen.org/userfiles/file/zipidole.pdf In PDF document text
    • http://otczenacts.com/media/files/fatezigapetu.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/416064e615492c2f8e44d1f0b1974508/83746405383.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/1025772486.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090d501acab6---67622977172.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fcaae97a3---35745117698.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/98053203044.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/61933644595.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/sajebolajobobevine.pdfIn PDF document text
    • https://alutat.com/data/file/jeredetolikivaru.pdfIn PDF document text
    • http://hookmyweddingup.net/clients/73542/File/47861430731.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/23191067f55b5aefc56c553173287b10/15093165179.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/nk1nak0gn9epkpe60m7ugsjgic/83194924279.pdfIn PDF document text
    • http://93564497.com/userfiles/dofijifirijuti.pdfIn PDF document text
    • http://www.celso.org/download/wofoxosobetalo.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/setoxidakigaretipanomi.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/vegigapimububukujijosek.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/7b7qq5mt64tth7mqf8hlgn5ttd/nevipuwumesewobenezuki.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/14923067201.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/43117642756.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/vurovoferuforigepabe.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c23e2bdab---susanuzemizon.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/vegejudodobafomir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=killer+species+menace+from+the+deepPDF 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_off0000eb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5C 17480 bytes
SHA-256: 4778bc72cbfae6300976f11395bfd8dd5718f4b825c9a5d86921981d4104f4d9
font_01_sfnt_off000118bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BF 10876 bytes
SHA-256: 55e74a860a35b49434d131e9fec1828140d34dea4f75c2ad7e1ee62845b51aed
font_02_sfnt_off000131ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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