Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88d7ad8f88d9c63…

MALICIOUS

PDF

96.9 KB Created: 2021-06-26 01:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3a1c966a23c379a7aa385081f2b39e8 SHA-1: a2f49795de75eb119e62fcbba1ccfc0149265735 SHA-256: b88d7ad8f88d9c6359e1bc1a02645703c99c5da9f90512148124812098e101ac
196 Risk Score

Malware Insights

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

The sample 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 websites, many of which appear to be compromised or disposable hosting, suggesting an attempt to direct users to malicious content or phishing sites. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 http://barudan.hk/UploadFile/file/20210523092850696.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52129a4784---38933056734.pdf
    • https://ntwbearing.com/UserFiles/File/32317804560.pdf
    • http://fygl.net/uploads/file/310255283169.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a11f14715a---12166049504.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/57rhhpjldmr7thp4nvipbhpu7v/26369231826.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/d9c0b4f88ceb59b977e4faba7b720ae5/dupozijovedegosiw.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160864521b8edb---kutasarigoxesirojowe.pdf
    • http://bephoangdung.vn/uploads/ckfinder/files/bevizinivujotiti.pdf
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/93797161195.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/23160f016951d604bd7a1774de8f81b9/zeresakimefimizo.pdf
    • http://aldara-latinoamerica.com/userfiles/file/gowimiv.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99ca74b38e---damanurolezodozi.pdf
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/dinozutaxiwosozakiwonojek.pdf
    • http://phoiinnhiet.com/images/uploads/files/70395284232.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160adfcedeb177---novomofufimasopanoma.pdf
    • https://kitapkapla.com/upload/ckfinder/files/26725672514.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160837f5982c0a---kelabekebiniselerusogidiw.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e4e8197ab037f3a518c088c5ca0afd99/kidepamuretosiva.pdf
    • https://alexandrapanayotou.com/web/images/static/file/pefegedusonixe.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9ru1f23gjqqmjlg0u0c67e6v30/37124031796.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/opif65s28g579vacnlpj1um3h0/varimaketuxapuw.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ftm8bmgb04ig2chi3e3uvuognr/rezokabixawiretip.pdf
    • http://wabasnb.com/files/fckeditor/file/8092356860d3cca65351d.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=product+manager+prioritization
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011519.bin
9f7f99e76825ba067e5843ce481cc347c86ecc4a68857d84b83e70dad1e3d658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 10804 bytes
font_01_sfnt_off00012dca.bin
dbf699bb4670a7807fc7564cc079d73f32cc38654e15aefde6db945858c2b7d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCA 17872 bytes
font_02_sfnt_off00015c56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C56 16792 bytes

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