Malicious PDF — malware analysis report

Static analysis result for SHA-256 2368c5966a3e99eb…

MALICIOUS

PDF

93.4 KB Created: 2021-06-30 05:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: feae9e367f5f2fd135ec1a0cb2bf5a97 SHA-1: 6e5583c6c0deab3ed88b2503672649d3c53bd532 SHA-256: 2368c5966a3e99eb65b7f597568d6380d3bdd5f58b646503d808e11bf360fe6a
196 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous links, many pointing to compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://coretry.ru/uplcv?utm_term=find+the+phone+in+the+picture+answer
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbdceb8446---95587556686.pdf
    • https://davaocarrental.com/images/file/pisigononopibijepitu.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe22e5e6a5---14990900500.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c4975f68cb2a76cc9ef260f1bdc6143e/movimawabilonopun.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/pcv4kumr7fu3ioifp9t5qq0vuo/424660203.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/sg3ttr63uioshaotuoled0def3/naribivuzovanevofapogewel.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/o894kjr3em7d36ar1kdfra3496/suserologepozalato.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/5002f555730828490424fa8a4daa5cd2/konevumikutumabexewawofe.pdf
    • https://sonarmusic.hu/up_image/file/nofemaninofoxifiw.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c5259256e---91443774719.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/bbf32b50ab926ee0ed33b13e2b1f640a/91042199225.pdf
    • http://kaupa.cz/userfiles/file/65854447839.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095b1194d17c---98795293067.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b8fb2a88e---26531827146.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081e75e5eec2---12052323223.pdf
    • https://xistenze.com/files/files/tefofugavolusikelategatep.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/911406b11ebe41d001eca4ca1ac60208/bubasefegulunuwiruzenepix.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f9a2739bf---27421283429.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607307efa4d74---29165737357.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/23294514015.pdf
    • http://jiuxingchaoshi.com/uploads/file/310850474575.pdf
    • http://zrdb-drogbud.pl/Upload/file/vunazimawuto.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/0658302c4358f00d9f00c464adc1550b/votogunuduxejomijaroxorob.pdf
    • https://brod-plovdiv.com/images/wekomerabipabo.pdf
    • 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_off000108f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 16792 bytes
font_01_sfnt_off00012106.bin
2e609324af4f2988909cd2c2d9c6b6c9947e34e9e25d7aa76eb3ca3f9d89aff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12106 17700 bytes
font_02_sfnt_off00014f8b.bin
199ee4ae6eaae7716fe502872a3914cb6c2a680a724a31c13ca364331673676a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F8B 10728 bytes

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