Malicious PDF — malware analysis report

Static analysis result for SHA-256 d694a2ce964386ec…

MALICIOUS

PDF

70.5 KB Created: 2021-09-28 11:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6851616550f2946f50bac1408d36302e SHA-1: 71035b266ecc741cc218060942b3912881cd0266 SHA-256: d694a2ce964386ec4f8455854a31af67e47b8b85dc8dff9682dd54261b9ba60a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://catamma.ru/uplcv?utm_term=secret+of+house+3+full+movie+online PDF link annotation
    • http://streathamtaxi.com/survey/userfiles/files/79758116532.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136561ce15a9---fosajebo.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/mesumumobebokaxafota.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/pubiguxofadubez.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/sebulipunukuriwivalitu.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/pirubiwogiwapapipumu.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/favavuzirera.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/dolojesof.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/55104187912.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///fuzikoxidapogiwexejamawon.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/25315155982.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/35105296541.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd29626b81---88323910468.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/dapowuvisovi.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/kuzosogikamexa.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/13239045792.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/25623792095.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/9867847312.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jimewesekunabidu.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/narirudavolelovutadekeno.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f95f3b5074---3061863032.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/22690475372.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109120552328703.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/gijimejaguvidiladij.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/motunonirinidu.pdfIn PDF document text
    • http://ducnhua.com/upload/files/44332875163.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_off0000b2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0B 16004 bytes
SHA-256: 586aa5e1e7567348540c04243fd91f4233354405d0c1f04d0880dbccfda8eea9
font_02_sfnt_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 10852 bytes
SHA-256: bedc01bed6a5d42aa4e9afb183a442088f0b5be47c3384190e5a0d0935294574

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