Malicious PDF — malware analysis report

Static analysis result for SHA-256 3360a0458122a6fa…

MALICIOUS

PDF

85.1 KB Created: 2021-07-05 07:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cf9650f3333c79c4b3e5d25b954af3f SHA-1: 82def7c6beaf06391db69a83ca84758253ce3b05 SHA-256: 3360a0458122a6fa3720656066deddab79e2f3a3850d2c06fe528c6e2482dbf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://adance0112.com/upfile/editor/file/58871316671.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9104e3666---pawinu.pdf
    • http://btc-ltd.com/upload/file/96491696045.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/b5428b96f4c95c418e9b03921d105d2e/28393179230.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16083019e4f696---235559197.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/7f69a98ecebde68e6b5c8c33db957b87/pukosaromididorefu.pdf
    • http://belhavenhighschoolalumni.com/clients/13962/File/pobotipiza.pdf
    • http://55pluscommunityspecialist.com/userfiles/files/lojil.pdf
    • https://sanipacific.com/attachment/file/viwajubewagix.pdf
    • http://hghs61.com/clients/9/98/9814c5f28b4e93efd1f74733a9fd6b0f/File/xaxujokojixejutaposoxu.pdf
    • http://barudan.hk/UploadFile/file/20210529154213083.pdf
    • https://dcoderesearch.com/uploads/totegafarifevofu.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fd84ae98a---podejupuzid.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072adba83e46---satetewa.pdf
    • https://namdolove.com/FileData/ckfinder/files/20210605_0E93C255AD3FCCDF.pdf
    • https://footballsod.com/images/ck-uploads/files/45465655024.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5011de637---93645969606.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608087cb28de6---fodenurobudawotubara.pdf
    • http://boeschfamilytravels.com/clients/43210/File/84507473437.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072c9b424ce1---baxewixu.pdf
    • http://buergerforum-tirol.at/file/36231490121.pdf
    • https://papersacksfactory.ae/images/bulk_images/files/lakejibiluxanowabujujet.pdf
    • https://topupdana.com/contents//files/vutanadidir.pdf
    • https://nhorizontours.com/userfiles/files/kuwetifojud.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c379de4a692---deguxisupomi.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f08ecbe85---31062962371.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a00e5dbc15d---33467137070.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098284081ccc---54365276677.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=auto+clicker+for+android+roblox
    • 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_off0000ea39.bin
1444fff2383f0fadcd1d4ae98bdcf645d231a1fc3316002a02cc0f9f12813aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 16856 bytes
font_01_sfnt_off00011607.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11607 16792 bytes
font_02_sfnt_off00012e1e.bin
8ef4692e70b77b995c95aa1265636167b04a6cf1e62e200eda64201d49955f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1E 10716 bytes

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