Malicious PDF — malware analysis report

Static analysis result for SHA-256 2197c44b306f5317…

MALICIOUS

PDF

85.4 KB Created: 2021-09-03 06:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b71a3d61d1a7a1885e8173722fd7b980 SHA-1: d85998b9e542f7817f2fff7a81ba74128b442b70 SHA-256: 2197c44b306f5317be0f9083fb4a32c46716e111ec9825b30b6e9e253eed9024
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=bluedio+turbine+bluetooth+headphones+manual PDF link annotation
    • http://ugyvednok.hu/userfiles/file/59369311999.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792537601cf---naxix.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/vazikiteru.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/032a5e427450cbe425fadfae4206a5de/62430658350.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/zafibuxadekuxamokusu.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/91748324635.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/5325da95c6bba5dc074a7c91a8873e9f/gukaseboduvizixu.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/wudoxeniz.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/sedati.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942bb961d33---46487352090.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/983777988.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/a2fee4qr35k2t629gnd5at5o05/levezurikukuwidomivaw.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610c32f2aa332---64448432546.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021073021151781.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/18346670262.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/7827966998.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/f7a4e059ae0d3535e833d6b92a8dbf14/jawufe.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210730213439.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vefogagopekisidijexebi.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/mitedorimilowakeworegaso.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/0cf7709bdc050a0c4a28cb78582a1c15/lesirevesokat.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/nijuselepupepuneworoga.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/lcc4cvsvv8c0qb4d2vp1rcpn03/8081343675.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/rikerakilivuwuxevop.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160839f216162d---lipatu.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/bedefil.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 16860 bytes
SHA-256: cefddd3c843784034f6b6e28bb7523487d5b7a19fda2fd8bda95f94167d96d41
font_01_sfnt_off0001164d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E64 10952 bytes
SHA-256: de8b2f847ba3afbf7b1d30acc78f2a9a3f82df7cbfb22850cd22a9bf514dc31b

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