Malicious PDF — malware analysis report

Static analysis result for SHA-256 f004da403c077bae…

MALICIOUS

PDF

87.3 KB Created: 2021-07-06 07:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 48f9a77ff75e70137dd55e0b57fb8703 SHA-1: 4ffa0108eafc415399877313b7fd2a3616453e73 SHA-256: f004da403c077bae99d9ce8982f0eac7cb99b2a6f263c7c0c3739b73da11706f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious nature by potentially executing malicious actions or facilitating further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://infrive.ru/uplcv?utm_term=bible+verse+about+the+promises+of+god PDF link annotation
    • http://ridendo.cz/files/file/19748191641.pdfIn PDF document text
    • http://kinocosmik.ru/sadm_files/davapufapubivawijidedugo.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/e461cb6decc8b0b59ad046ec9fc3c0e1/lafenerezizisubosikukuki.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/tozagux.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/c934fcd8d1d558bd4c88893adeda6886/70355716656.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/23159179712.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/pigovarufumog.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210512/file/72368249264.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/25209396689.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98ae969cf4---9590324622.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/78922534977.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609765515df0c---xuborezol.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc796acd7e---90764489343.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762c6c4e834---jututaxibim.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28335823714.pdfIn PDF document text
    • http://1970lions.com/clients/5/57/57eb30a5877ba0c7834658d164206012/File/42773053132.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d7045603b1c---xulamowijakaw.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/qr1hro0sb5lmev49k3m79gb401/14814435403.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081464f208f4---7799956176.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/k6d948vttrqed85qblfhn62drv/detitukinar.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/d6f5b095f14b6624756d69bb17d7c2fe/31861985826.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f4ba9b56c---totadivujawagoxalofavin.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/53086310310.pdfIn PDF document text
    • 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_off0000f23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 16868 bytes
SHA-256: 0869aeecc4bb21a9e42e6019647da6121d01ed984f432c83fcec14aef53abd42
font_01_sfnt_off00011dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFB 11200 bytes
SHA-256: c3b3361c55cce9316d757f54dbe6953c7a60194f2539410c881ea8beb25bdf79
font_02_sfnt_off000137ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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