Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a24f3035a9310a…

MALICIOUS

PDF

82.6 KB Created: 2021-07-19 18:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f266e480ef8cd4b1baba356471565d2c SHA-1: f6ec86f7c3e5583ef37498a37008a1f08a5ccd41 SHA-256: 96a24f3035a9310ade7b6a38f885f00e4ec59c99f448f65d7663499480a9dea6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/4045ed956ab8c734ece4772b0713114b/xisuxexife.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b8198d4eae708afc9421c2e0a574ce94/96791053964.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/f3b0ad38609d2c540604cd37f14ff019/85335830451.pdf
    • http://www.addvanceo.info/userfiles/files/matedujakedikibimuj.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210523214415100.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/0diq2mbqnk8h17o58sp7g5p935/gixufewu.pdf
    • http://suacona.com/clients/16856/File/posexinavuxarenuxus.pdf
    • http://solarexperten.ch/fckeditor/editor/images/file/diwiziw.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/l6e8nbb0o0oc557dv2htok87n0/wegefamakipisarirerapaja.pdf
    • http://openendrep.com/userfiles/files/31597661987.pdf
    • http://anaminfo.com/attachfile/file/57682358893.pdf
    • http://detskaoptika.cz/ckfinder/userfiles/files/rebab.pdf
    • http://bbfederico2.net/userfiles/file/4962575638.pdf
    • http://archerelectricsupply.com/userfiles/file/dobegideti.pdf
    • http://dongamold.com/fckeditor/upload_files/file/punosulixewifadoforaga.pdf
    • https://www.mds-horizons.com/upload/files/mimegonanu.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608498d2210a4---50669537822.pdf
    • http://fixafilm.se/userfiles/file/viwizafapijomazido.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/uj2f6unsluv35tln1fjbda61u0/70905226464.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c2450c391---wadewegugetiloka.pdf
    • http://weilandensemble.nl/ckfinder/userfiles/files/fisuregopeje.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/f97ec987efc2071f1781174c4544aded/minisigofodesigiviwali.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ministry+of+youth
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e00c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 16792 bytes
font_01_sfnt_off0000f823.bin
dadce58ccc7609faabccfaf051a0ad4bbe472da38043143fa4205a6e1914b603
pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 10176 bytes
font_02_sfnt_off00010ee3.bin
1f4893720fb93f694957b00746d1c4fb36e1f04919dd2a9873173514debc4047
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE3 17832 bytes