Malicious PDF — malware analysis report

Static analysis result for SHA-256 01801c9155308640…

MALICIOUS

PDF

92.9 KB Created: 2021-06-29 08:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d2d53ed74f0311a6041bef0f46127218 SHA-1: 5574720e3f3fbd34a53c9f7014aba27b95f56380 SHA-256: 01801c91553086403d4a7b56e98747d5070208c76e5eefdf7078c20c67b48496
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the 'formcraft' plugin's upload directory. These links are designed to host and distribute other PDF files, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608af29998725---47046260262.pdf In PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/beruvedemofebatugotuw.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb280ba500c---23634957432.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/98625129740.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6e3149999---bamarominafetuseliden.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9qbja40hrn3k6fnodnv5kmriqs/23978089558.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dfdf6f0d7---nesemebapalitugosil.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/42411201636.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/290319067114.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3d8e3e879---146826365.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b389ef49b---palob.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/rizusukanusojudusibe.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///4299975290.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/5255952592.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d90c177cd6---29420396363.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/504ff71c5f444941794a3b05385f35d9/16334796666.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22041e77d7---49939251858.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ebb60f3fb---wutufogadezibidinuzakod.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/e0d484c6877fb89041260935860e0f80/loruwamiloxabetajaposi.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b6286f4a4---pekotezejezave.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/bogemawixozove.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/fdolko1elg3645qgscja25t7j1/64474180150.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9fcc4ebae---31946404915.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/84776073460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=gloud+game+mod+apk+unlimited+time+2020PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off00011914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11914 10940 bytes
SHA-256: 79cd0370f28ec82a617356ff7f6dc6ebb49ff8c201ad5960085601c33d763530
font_03_sfnt_off00013239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13239 16476 bytes
SHA-256: 8c9142c49cec9a033531e8e228bb42d2d6dbc4925a45e438b37d8031c59282fc
font_04_sfnt_off00015cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF7 1728 bytes
SHA-256: 87227c29b4015bc00469f7f4e9fd842580823d6de8a967b02908c37b1e68e5fa

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