Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1b014c2799ebb2…

MALICIOUS

PDF

83.8 KB Created: 2021-09-14 03:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 37807c80e4993572cc8113db9ce13fa3 SHA-1: 2e96283008e591a2d2c2e183f3070e99506492a3 SHA-256: bd1b014c2799ebb26839da81761afcf05ca6fd5edfdbe8a41f13a9c01a4250d6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://irlanc.ru/uplcv?utm_term=the+legend+of+zelda+breath+of+the+wild+dlc+download PDF link annotation
    • http://nguoigiupviec99.com/webroot/img/files/zokalefokusus.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/mixise.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/88316968333.pdfIn PDF document text
    • http://strandedtattoo.com/file/wolewebemulifuxujus.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/49355231281.pdfIn PDF document text
    • http://tykhchem.com/upload/files/dulutavibarugejapupig.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/pitisilewalavifatejilis.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebe9d5c0a2---40892731937.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d95c050553---86318921641.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/kunitowijurasikazikoxug.pdfIn PDF document text
    • http://soc-in.com/data/media/files/86068336605.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d377bfbee---dobujixusolumuvuboraluj.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/57420435225.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/66859308487.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/2p3roi7k8verugvgv294rqpmd9/demoleduvekigirodegawim.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/veledepususadaviputan.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/88990341056.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/3165182378.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/27987701328.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/gegoxane.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/39033309615.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/30702416826.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/dlumk9b8b2kb8fripu01dartt4/61690969730.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/98451983749.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_off0000e0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 18276 bytes
SHA-256: fd6619a66d49c35658a4a0b568a9b1b5740748b2aec109f858a589ad442948bc
font_02_sfnt_off0001281a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281A 10836 bytes
SHA-256: 6fe30b681e23fcd363628f49baf99206912b8612caeab369c9da4c2dff8bf33d