Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc5cfc41eae1068…

MALICIOUS

PDF

88.9 KB Created: 2021-07-01 23:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cb0b63b009af8af4bb487bdb782ac034 SHA-1: e5058573f20926107211398e0a72fc2d70fe9f20 SHA-256: 6bc5cfc41eae1068b80933952bc5282242f6f5e7135c7da98a77c4f0fc73dd65
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://occahomesearch.com/userfiles/files/25573923548.pdf In PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f57cf30465---mosavumukebegobexularegi.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/41280960632.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/1eb3e42a4f5e80e8e9aeb759e0329133/31131923045.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/4221o682m019d673k5dld7e881/watipivotawiposoduwikil.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9483e55750af90e94fb43e6c7602fbc8/18103554242.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bf9f2b6c5---13075502112.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3f1d6ed5---fadegesatuvarod.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b69f64ba9---94731495860.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac6f6cb79b---sinanogetutifabizoz.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/59184567890.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/nsat5f38iumh4ct8ed1mocdlm8/23338775276.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/lofogeluxixawibumex.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/56iepd97jut43s6l0djmc1ml10/bifudubukokar.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/b8accffac736cab4f18beed568263688/11466856510.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/8spm6m4g1hgba2vqknnqpg4pbr/58447266696.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/zitajuposo.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/bthne4f9asqsl7ss02rc7qta2h/95161824023.pdfIn PDF document text
    • http://domplus.su/userfiles/files/joxesexuvifevop.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2459e55b8d69ec17022d35a68c1eb844/dekedix.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/0hlmbvrba86r53f7h93rvdgqq7/jadixuwima.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/643050843.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15fdb105ac---40796113389.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/glsom8oer4ui61tgr39kasi8lk/zadav.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/eoobfn891gl29uoqo815o27uv5/rilibaxuruwineveriruli.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/fewim.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/nuderiruzonasari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=mpc+player+for+pcPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5E 10120 bytes
SHA-256: ca3c79267f5fb4f62442e0e5a625cc8ba88b9c0bd1a5c1cd9242cd7e92e7a2e1
font_01_sfnt_off0001122e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A40 16932 bytes
SHA-256: f730ba784f5ab89a2ea23c971cad15ee375fbb140016ea3e2e0e3a930b0ed302

Open this report in the interactive analyzer, or submit your own file for analysis.