Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30496793d606d5d…

MALICIOUS

PDF

92.4 KB Created: 2021-06-25 15:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5795ac0197aeaf623b116241735f6dc8 SHA-1: 9a2710fc40a4d3d2375065beecf58ac6e9943328 SHA-256: d30496793d606d5d297d5fffc398fde344e4ed70e5da01890bec4403666bf6d9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and embedded URLs are indicative of a malicious document designed to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ogovn2vfec0a38ilmc249ho9m6/kagemomuv.pdf In PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210429041417107.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4e7bdcbc5eded2ce869bdfa93a9afb08/56619631318.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/64723662646.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/64297320619.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/038bf55c15e2cf6cfadfbdf8926a3230/20653033578.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/42019986721.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d9c973d4ce4dd9a72f57ac22ed818cfa/levagok.pdfIn PDF document text
    • https://plasy.com/uploads/file/56192051907.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/5927f70cd5336891dd7ecb6356f659e9/94594689030.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3d7064297---babalikowufiwekuxavifizu.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d1ba16ede---99956518498.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/gfrb88ck3aggj16qsdkdrgr856/22816887025.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b099a39f445---28713746864.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=14+and+under+1973+onlinePDF 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_off000107e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E7 17224 bytes
SHA-256: 3b0f17330c52bd67d345791791e79b6e1546822624756deec52cd9a210fd8a1d
font_01_sfnt_off0001351f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351F 10500 bytes
SHA-256: 5dee19f5d0cf0066b298fe961bf87d6c50ba20e0cfed826eccf73447751b0eae
font_02_sfnt_off00014d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1