Malicious PDF — malware analysis report

Static analysis result for SHA-256 9078a79ed2c35c73…

MALICIOUS

PDF

84.9 KB Created: 2021-07-14 03:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0e5e00ce3efa9b87948e366da2df5401 SHA-1: b079c3802da7cf4f12754a1804c24be0c9de1092 SHA-256: 9078a79ed2c35c73f7dcf149c2c36af042014d3eccf302809efb0576d862bca7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that point to compromised CMS upload storage and disposable hosting, likely to redirect users to malicious payloads. No scripts were extracted, but the presence of multiple external links suggests an attempt to lure users to external sites for further exploitation.

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 http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160926dda6e974---fowikujiw.pdf In PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/39292788339.pdfIn PDF document text
    • http://vienhung.com/webroot/img/files/votidesepezedigolumivif.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/katudaxilazinanuz.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/1491701430.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/dbbe95ea7241fd8f40790ae63cdfad8c/vugabajigirum.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16090ae28bcd47---vexupiwuzovedojirejepame.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5be47b679---26250728984.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/27832963460bd33a2058d3.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/vekafano.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/aliv79fga5qdv675ft53icj2h7/guxofifaxulebinibobosu.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/70ab46397140b177c7c81a9bf080e698/93138374787.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/borafapexif.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/kasipisulafipelixudubefo.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/lv66s6kq2g36h32r495p9coume/49492368665.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/8e58c283c217aeab590482ebf1c68e34/85212391332.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/045f8b899ac2895ded38b18dd729c43d/99951946826.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/oj0q4dbmb2qme60674qpg1d7f9/21803572626.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/b562fbc27f14f83c5051aa93358e91e2/vuwaz.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/zupen.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/alq2aerds8mnr4sa8qcvtf7rbq/fuderumibiwi.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/153ae943a2cf102941a58cc2e8c5b7d0/dujepebotejikiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=from+the+start+synonymPDF 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_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 17140 bytes
SHA-256: 442dc9d2d7a45fa42584bf0acc7c83f2f7e026cec961edf07f8ccd366ebff4c9
font_01_sfnt_off00011775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11775 10324 bytes
SHA-256: 8b1cff4fc54faee586db3444e445c6c7558a6c2d8a74d43e3204ba59e890da4a
font_02_sfnt_off00012ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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