Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fcdcfeb2b3f960…

MALICIOUS

PDF

91.7 KB Created: 2021-06-30 06:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8003e31a8bcbcfa34fa1269e1e78aaef SHA-1: 26bd6f6218fbf091644c39492c783daa267e97d7 SHA-256: 67fcdcfeb2b3f96095a2bb85b75746cc70a208f2b6c20e8046df44858ca1c107
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/da32748e39d655a27da066fa320e8f1f/gifobo.pdf
    • https://superpart.com/files/mazut.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/14bd1ec6723a18a74fd740774e668a04/28487899022.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f78c5e0349---86613178987.pdf
    • https://echipamente-scule.ro/userfiles/file/76082910714.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b10475a482d---jajekuxupetonaze.pdf
    • http://abpaluso.com/upload/file/xubadezakobubatakexanavu.pdf
    • https://webmenuplus.com/images/file/84064634475.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834a82b0d0b---70061400707.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/can05g86ejn45gfi2tussd0vs3/41666488862.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5460339ff2---mitasivopetuvozopome.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160908a9eaaf82---lakubefene.pdf
    • http://abwalabamaave.com/uploads/files/48012332455.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b810cb46a---pesusefijini.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf02dd90f3---joputomodibanavukivaxivi.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160948388935b7---matuna.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/984cd894a77a29a997cd5768026cc7e5/71764910891.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2c4522109---48664823730.pdf
    • http://cec-intl.ru/app/webroot/files/file/mujurogizozig.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fe15b4fd8d84e260e57ab4ada4252f5e/fibipidodavikudorukuf.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/983cf40dc9b810f9a4c8055086f6039e/pelabawadupanajodavaw.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c939e3b2d1---5793936706.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/64d94f1b9d8d07a10c2c8bc077738566/vexilekutilopuwesez.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a694e73cb96---66214236558.pdf
    • http://smolensk-bakaleya.ru/userfiles/file/gejusifufosotazumefe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=rectification+of+errors+questions+with+answers+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001286d.bin
1b31d2a1f0e19777673f24c73e89ecd419414c709e532b3d19f7e04b377a311f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1286D 18428 bytes
font_00_sfnt_off0000e4c5.bin
63ff519d1ff716928db19e9ee59535b3bdcb3b4a62e9196ad1fb0e3c3316d9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 16820 bytes
font_01_sfnt_off0001105c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1105C 16792 bytes
font_03_sfnt_off00014534.bin
7b90b4295d451fbc5375cd4a22795791e9d19688dbc37afafedd0a5f3ec30b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14534 11048 bytes

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