Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace3acb6aa6c89fb…

MALICIOUS

PDF

82.1 KB Created: 2021-10-07 22:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4d2bd89ae1992e785a626fa28a2844d6 SHA-1: 2847ae3f4d745dab7607e88f0cfbff74e19a5111 SHA-256: ace3acb6aa6c89fb13f28f72fd4311b7efbdd5aecd0ef189d40dc1ef6d2b7132
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript further supports malicious intent, likely for obfuscation or to facilitate the redirection process. ClamAV detection and ML classification strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://drafthe.ru/uplcv?utm_term=father%27s+day+dinners PDF link annotation
    • http://porpora.info/imagenes/imagenes_contenidos///megikixoxemori.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630633549.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/76958650789.pdfIn PDF document text
    • https://stl-log.com/htdocs/cljr/data/files/90205158889.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/88196738662.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/57365532796.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/33431565237.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/zutabijobamukotizeg.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/33196192378.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1614ed0e8b1f11---90879894753.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/0462f309017a274c447759bb5a389923/bogijurabajeranikef.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/81323613387.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/jumij.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/21829880515.pdfIn PDF document text
    • https://semut73.com/contents/files/90757197156.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/bakavojikalutujiwetat.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/dapodevagesufejep.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/vexivivapiguzunopaz.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16132fb42ead2f---ronasezogevi.pdfIn PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/tejowuzijik.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/70537624462.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/dogemedomenifalelegisev.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/96297165937.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_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 10304 bytes
SHA-256: 645cf40609df45f2a6a7576c7311267b560f858066a08032c887f25530fb4bdd
font_01_sfnt_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 18772 bytes
SHA-256: 6e6e0c334c2391ad882f55877f8340723863501c274abf41c0035b07c733a0ac
font_02_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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