Malicious PDF — malware analysis report

Static analysis result for SHA-256 063f743985dfd8d0…

MALICIOUS

PDF

92.4 KB Created: 2021-06-26 07:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d1b52215ab74501501f00417a5da8b0 SHA-1: d5ca435470c6157325566fdf9fe808e9713e794a SHA-256: 063f743985dfd8d0e9ec06c4b4fb0fc7e5f65881add6d014021200aa86e4e7e5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. It contains numerous links to external PDF files hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The primary goal appears to be tricking users into downloading further malicious payloads via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/4e05a170d979a230d4aeddb3250fb0a7/7143489863.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/1afut4noq0ubplmitkjvjescf9/telofadibokute.pdf
    • http://komputerzagrosze.pl/userfiles/file/65143952221.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3030041b2---fonamuwab.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085619a1d043---lejes.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/titanojewojigizukunime.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/qolfpd0r65qiod71rc1pgu2602/91071831823.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/0bf5342368f93bac2775a935f6c6b080/91661105317.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/48f1c949556f910502fc94ecad26adf7/memolawinotimi.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa34044bd4698d08de5641fb18ebd183/jeturolurosenowulifaronoj.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/22e96e426cc31e21723e93398b27c78a/nitiradafifowe.pdf
    • http://softwarefactory.nl/images/file/nomuzamotonubiwub.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/54b47ca143f49a8631f2baf070a748f6/11017047591.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/a85f3e6048d70f41d7d486a30b021657/mezogiwozolebo.pdf
    • http://antifftech.com/uploadfile/file///2021051004161366.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d7ec5efe1---16221722038.pdf
    • http://mikailang.net/userfiles/file/20210508200836_1180912357.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607893801889b---26335857362.pdf
    • http://czdashan.cn/uploadfile/file/2021050202355273499.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/eid5201fiofljuad8rr67fklia/78947730899.pdf
    • http://hzbmsj.net/images/upload/File/55212866951.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/49f9853cbe03c3352305d4be0df54622/9526034973.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bc235ea5f60---38940386404.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=at+your+peril+definition
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 16792 bytes
font_01_sfnt_off00010750.bin
2bbc20aefd81af29486d4675a8af52b3dc2855613a9e1c17556a04a909fe7338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10750 10356 bytes
font_02_sfnt_off00011ec9.bin
51a342fcd514325358f789d2012bf926da30ee8d7de88006e6a71f9fdf589827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC9 18740 bytes
font_03_sfnt_off00014efc.bin
8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFC 16060 bytes

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