Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d8769430836905…

MALICIOUS

PDF

91.5 KB Created: 2021-06-30 20:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b80410bf5dbd48d92a342080ea4afb6e SHA-1: c72594806d19c79462d74ccd72a7f6bf5603e716 SHA-256: 22d87694308369050eb4af9b739dc1f7dc2bdd746832e0d36ac52ed993f8b6e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a link farm designed to redirect users to malicious content. The 'SE_INVOICE_LURE' heuristic suggests a phishing or payment scam pretext. While no scripts were explicitly extracted, the nature of PDF link farms often involves JavaScript for redirection, hence the inclusion of T1059.007. The primary attack pattern is likely spearphishing attachment, as this PDF would typically be delivered via email.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fb12b5653---45994353403.pdf In PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/903a16da1d8a80d630e8740613487beb/42269942005.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071b76c4b177---79307719513.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984654ecd8a---6023994293.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/60295537373.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/wajiniruzamemuxodalokotet.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/40047005311.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/kuwepoxutemonemuni.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4ea309da0---fuzew.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/7c04ce5c742097c314198dca26629a4a/33462997867.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/fobumizodademegu.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160890e0d05e77---lunibin.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745d8c79f0e---4846651540.pdfIn PDF document text
    • https://anfauglir.com/images/file/girogo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae61d0e98d---73258410650.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3ab30bc16---32272068954.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/mvi43bkf22jrn2tcpl6qu0i9o7/18635611410.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/belixevobubipop.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kaa45bjqgtceqlq45q1ngl3h11/dezerijigawajonisobok.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/94165807185.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ee6949047---16169888330.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/r5ch9sevduh68rn0frm28gkk24/pinumepagidimijapigi.pdfIn PDF document text
    • https://o-dance.com/upload/files/97293081868.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/41732124283.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=operating+leverage+in+financial+managementPDF 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_off000102fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FD 17224 bytes
SHA-256: 697d62ac88f17725ff89137760c815dced2e0ed3319eaf0b51e538c87d1c8e21
font_01_sfnt_off00013041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13041 10628 bytes
SHA-256: 3fc57c87dad21a9dac70ce3f87e9ebccfd4686bb71eb5a5212fa9aba19864621
font_02_sfnt_off000148a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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