Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34efc75c82e7035…

MALICIOUS

PDF

89.3 KB Created: 2021-07-04 10:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 236a5d220630b0675a35b057dbed020c SHA-1: e0c64479a63cf13f879550dbd872f45d93a6976f SHA-256: d34efc75c82e70356c47e3880488552e6c32c49c89aac060b88127496cc65f57
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised CMS upload directories. These elements suggest an attempt to redirect the user to malicious content, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pistant.ru/uplcv?utm_term=lie+with+me+full+movie+free+online
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f47b07904---79331830113.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7dbf4c5cd2c4a80717dd69b18ff9929a/wakejupiwafij.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/6975818b87774c528f92ebd154819c73/48273183595.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/jluqv6h7oh20sf9kbp6qmap2hc/53424962321.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/raa2gh9pmti3trq7os1tqrf9cc/dakaganepofewatokexaner.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/bcefe053e2487a0b37671fd2d7c1cd16/40967343640.pdf
    • http://diversecityuk.com/userfiles/file/22617411534.pdf
    • http://goldmustang.com/files/files/15923628794.pdf
    • http://al-bandak.com/userfiles/file/kaxape.pdf
    • https://cottingham-group.com/cufiles/files/22758779088.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/notixifisesopejabufatu.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/voramodimitesavewi.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073974deffc4---29458807431.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852dd3596de---zabaferodobozotukovamujun.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c39ca1649---16545254727.pdf
    • http://otvorene-srdce.sk/userfiles/file/58823371010.pdf
    • http://deurenhanger.nl/userfiles/file/69847903269.pdf
    • http://bensonlandscape.com/editorData/file/sijat.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3705acc9c138034876e68bddd43ac8f3/26080462412.pdf
    • http://technoauto.jp/js/upload/files/figegerixipelunukutatimi.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/ganun.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/71250421340.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098b19d04e91---lijotonarelawadij.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/84551699101.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7cc731762---xifigisoz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae5.bin
f1580f679c6b5a542e6a138ecf31b745f0abae8073c274f8a24aa08c7db64476
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 10360 bytes
font_01_sfnt_off0001121d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1121D 16792 bytes
font_02_sfnt_off00012a2f.bin
4adabcf2fb9c96677c2571a6c7faac0158de633822a7b98bc778423f0dfa62e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2F 17504 bytes