Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef9ecfa6cc63563…

MALICIOUS

PDF

87.4 KB Created: 2021-08-24 19:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c4a55e7d52b4a62943adfe5de5a4078a SHA-1: d8d480270c03af52f776a121b0959e337451a413 SHA-256: 7ef9ecfa6cc63563516e68fff7c6d3927f8b54ac29040e8b4bdeb2d259110c0d
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload directories. These URLs are likely intended to redirect users to malicious sites, potentially for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b4d9db150---52229724522.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/1r64e7ujlsr8dm08qpt81cp1ib/66542121456.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b22d30938---6283777411.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/kevexisefamofesejo.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/rubovimujejisukesede.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7d65ea3a6---53297619207.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/tifesuwuzuxotewuniro.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7421577bdc---dutal.pdfIn PDF document text
    • https://senhewood.com/d/files/76912078956.pdfIn PDF document text
    • https://viettrungson.com/media//Files/zonibodunelisovamumut.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/69956617660.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160900c9381589---dufegasatajapixatesirefu.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d7c459e72---resulozufov.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/fimigunivu.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/riliwajoxanev.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/72579593319.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/1dd2a2f94786505630ad8c32fe4920e6/95659861646.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/telinexetenurode.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/63577543350.pdfIn PDF document text
    • http://meta-min.com/files/30878918376.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/54972581691.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/90906091685.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/jisibixevetefibojasudo.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/86884527516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=to+be+in+troublePDF 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_off0000ea82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA82 9976 bytes
SHA-256: f35acf36e65871dea47d18ac5b088877fb866ee79d5e9f1b17dfeda6c9742d74
font_01_sfnt_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C3 22840 bytes
SHA-256: 42dd99f988f6be3c9693eff521c2959b02c4c7338d795cd48f4e40e82753e134

Open this report in the interactive analyzer, or submit your own file for analysis.