Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ba10d07715b1b8…

MALICIOUS

PDF

82.1 KB Created: 2021-08-14 16:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4a7e87d63950317a8a07a2b3db469243 SHA-1: 3e39d11c39786c34716054f36b5fc36af628142c SHA-256: 34ba10d07715b1b87cb9a905e5eb0056331889c8afbe108c36439c205df60654
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and a download button lure further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=tere+ishq+mein+mp3+song+download+bestwap PDF link annotation
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4c4e4fd4c---wavavozi.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/jikeparetiwolagabolazonif.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/11585566222.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3be7832c522d758231426b527a8148af/5550533728.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/rijuzagiporexekip.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1892dcdf1a32fe836f32b1cadcdb94f1/48851290603.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/4278886390.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2078cd8a2f---9874563853.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161080ca12cc02---27299150082.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/27928201798.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609649fec5772---lanogumorafirixobiripa.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/54881315183.pdfIn PDF document text
    • https://tsegypt.com/file/kewepuporevugamabuso.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210725074531.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162894563567622261221.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/68090557320.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/59426337140.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b433ac8bc39---kiwugunijaxuvaradafitug.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/69948230362.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ef563dda2---84145929937.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/278l72si00dkl558pvbma15mhp/55581305626.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/74724063254.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2a603e07f4---92493142291.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dcd6bbc49---natavedomomiwitunozasazi.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083801e79498---jurilapamovi.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856e5fb6544---3446224979.pdfIn PDF document text
    • https://ecole-anglais.com/upload/files/povagikojofufi.pdfIn PDF document text
    • 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_off0000da44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA44 17428 bytes
SHA-256: d87d8b483ae2c1de952c4e342ac58db60d314e63feba5963f0604d6f87d6dccc
font_01_sfnt_off00010850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12067 11344 bytes
SHA-256: 1e8a5c31253e106297d23f28e98b2976598c714bab4bf73ff77d6ae6887fb8eb