Malicious PDF — malware analysis report

Static analysis result for SHA-256 d208e5f14f9b696f…

MALICIOUS

PDF

85.9 KB Created: 2021-09-03 07:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ba19bb0655cbe473f7e1e19c8246fbd3 SHA-1: 04d10bb3f29088b37bf8d235a229a2a23f53a34f SHA-256: d208e5f14f9b696f95bd5b1a5968cc53754e2dfc0aaf38bd1248d7efeaf156cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV heuristic strongly indicate this PDF is malicious, specifically flagged as phishing. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with phishing lures or malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ddshower.com/ckfinder/userfiles/files/nugatonewifexojo.pdf In PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085835709cd6---bevanale.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9513a5114---mevomerijorav.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c915199e1---jikutaboburodigolupiteka.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/12360026191.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/14359999401.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/36706696291.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a491d4f5a---zorojedepe.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/56bd10b0eca2fa7a2827ee169f2fa9e3/tugulubup.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/banamiguderiwufedu.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/36946286227.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210628_19706C6B14FE8FE4.pdfIn PDF document text
    • http://pasted-radio.de/web/files/nerup.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/76a17433cf8564c497cf1bb5d3d00536/faporiroxanopadodiwadi.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609d155e59e8a---buvor.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/57229437570.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16120b2179d689---56181879284.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a7ea5436866f18c73535129408923e5c/rawaxebibidumovidet.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/62873510470.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/14940481862.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983f75cdf4a---seguwoterura.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80db8b1609---26825892409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=oxytocin+mechanism+of+action+pdfPDF link annotation
    • http://irodori.kir.jp/files/file/32949443047.pdfIn PDF document text
    • 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_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10252 17696 bytes
SHA-256: 07a3e0cee218a26cc7d4a9e28de61caf559d6c3ca96a5de50abae3ec27b10382
font_02_sfnt_off00013056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13056 10980 bytes
SHA-256: 3c3c613fd4da241bad8d0c9cb40d129426be9749c4e7946099085b392c15197b

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