Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2cd995f96785315…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 07:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 48da310f3710c65b63d453db8856cf34 SHA-1: 8d28712c83b2da813d3192c900dcfb2ee361bca0 SHA-256: d2cd995f96785315fa86c12b66b6f3b95a9fde987186c197fef802cdf8c44bb9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to obfuscate malicious links or initiate further downloads. The PDF also functions as a link farm, directing users to multiple domains, some of which are hosted on compromised WordPress sites or disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://albertopizzetti.it/userfiles/files/wenomibogubufividanasaz.pdf In PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/66914818851.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ht8p9i8tdahpb5e6k6g58g3dpt/92676890026.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/rogigijak.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/fowimoleme.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/zewapiparerake.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/d898fcbe903242cec0f4386aad7876ff/zuxiwefeg.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/44099617057.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080e8a140ab9---97803593940.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/pibevemetoxufajijadu.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/tufav.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/49064570307.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/08f037f50e7eab85fce626a9bc2dbcb3/22480667795.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/16096988715.pdfIn PDF document text
    • http://healingpawswisconsin.org/clients/a/a9/a991db820639e3552774ed9a746c1e3b/File/kudutituvuzeriranenuziku.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/c791d6e0d2e867097433156d33f7894e/83165680437.pdfIn PDF document text
    • https://avenue102.com/uploads/file/turarefof.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/90005712052.pdfIn PDF document text
    • http://jp-photo.cz/soubory/files/1721527144.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/roguwesuduwazalapuku.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a337c75f49d---69706207947.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/samadixisepikadefax.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/f0d793f87d82c5c531406f691798decd/zaposivelabezepiluvotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=bumps+on+kneesPDF 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_off0000e35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 17144 bytes
SHA-256: 54ed5bc2b3d51e48887cdf74227a9731b2625c185d84f857839b6294dd16f71b
font_02_sfnt_off00012807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12807 10160 bytes
SHA-256: 135f41f24e54706bd3ccf20b7589bfccaf6456c484cead308560d746b1cd126f

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