Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ae232340ee2d32…

MALICIOUS

PDF

88.4 KB Created: 2021-08-05 13:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b90552d18d741848a93fb48ac5a39a0a SHA-1: 5b7a8bd1d33771fb527ff206380f175b454cde90 SHA-256: 63ae232340ee2d3219fc25b470cf0e89164e96799fa6578994c58c6f44d54d37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to potentially compromised websites, suggesting it's part of a phishing or malware distribution scheme. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support this, as these are common tactics for SEO poisoning and directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://asesorgubernamental.com/images/file/80191890794.pdf In PDF document text
    • http://hollywoodterrace.org/clients/863344/File/43293850992.pdfIn PDF document text
    • https://hoavily.com/uploads/files/41324791994.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210726054545.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a269a412386---4255901279.pdfIn PDF document text
    • https://amblamy.ee/upload/file/xuxezapipelabepid.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d521aa083e---16357972522.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/31372479820.pdfIn PDF document text
    • https://arzhosting.com/calisma2/files/uploads/doviworiwideg.pdfIn PDF document text
    • http://ipllaser.in/uploads/mowibigoto.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/luluziruga.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/28047784482.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160746bfc67ed6---32458387359.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/63680400373.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607797dc9b512---nezovetidulid.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075566a9e4fe---niwinejugudodel.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/60160107616.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/29293047995.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c26cdd9aff9---jusobekapifego.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4cb17982d7602b20401f13be23ee95d5/51693236023.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/7619312278.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160bd60d1a3d3c---kutigesibiruzog.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/73753772425.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d62076683d42e2c53ff1ff59a77848d4/20655345626.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/wituniwenemiguxakapivigo.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160904ccb238a5---buzozilexapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=bengali+romantic+story+books+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off0000f2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E0 16448 bytes
SHA-256: 314e9fbc0dcf361988a2316d275cfdc216d82bf5a30d7f50ef29bf877996a8ac
font_02_sfnt_off00011def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13606 11448 bytes
SHA-256: 806c960455749b83d448b75ad61a4332b332e5ad948923f1522aa550b6bda1a4

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