Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ffd6a62d2a2f6f…

MALICIOUS

PDF

96.7 KB Created: 2021-06-27 09:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 44380f75fcd05ed586d52b9d2d305a10 SHA-1: 46a56af4e3c653cf5c1f33787e11395c295ce1f1 SHA-256: e7ffd6a62d2a2f6f5f36b4baf01643d932928bd325aa6c5fae960abcc2e9827c
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on disposable domains, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically a phishing or malware distribution campaign. The embedded URLs point to various compromised WordPress upload directories, suggesting an attempt to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aa7494fe1---22966190678.pdf In PDF document text
    • http://ccswcd.com/userfiles/file/jisafitilexuzozu.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/95324962498.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f3765dfbff3d70a3ac4b91522472bbdb/tiruzevofo.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/5ad744fc22fc9ab0bdd51a82af34dffc/2471032161.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a62aef1d0be---29131816925.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/53248fc0b48ead259d465eeb838a22fb/72162725003.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b28d037ca7b---tozafoxawaxukepelu.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/25362954538.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/gaxoveki.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607c740a4877b---64334102508.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/16945814142.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/fudolinewubosuta.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160814bad3d5b9---42237608647.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf91bd2fa8c---rarovosozukaku.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/5b1130cd9293d11ebc8a9768d9eb8579/50270543510.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/xobirefovom.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b143651df4e---95792861808.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0659773d8a---99036225182.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/69300849413.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/79436076875.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/94399425771.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cdf03ca2e---japegoxe.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f4b2295f3---9636230300.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/68464870272.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=meaning+of+sun+bathPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000103e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x103E1 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 10580 bytes
SHA-256: f1e3d21ba09be55a24613d047f8ba8eed632f934abbd001b215373b09e9efc91
font_01_sfnt_off0000f667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF667 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_03_sfnt_off0001217e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217E 23400 bytes
SHA-256: 15bfa125ab236b6f5fd9eeac18d234728374cfc494649f839f44d4ad442d6365
font_04_sfnt_off00015b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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