Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6792ea488dc3df…

MALICIOUS

PDF

86.5 KB Created: 2021-07-19 10:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 63c7985bbd9a9fd2c0ffd4c1259b3b3b SHA-1: dc7b90ada4d180e9b8766add8c110aa809bbd0ea SHA-256: 7e6792ea488dc3dfdcd9a5fd12708309bc90886afe24f66975f95d403c07cc67
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://deshdunya.com/blogimage/file/xexeputopa.pdf In PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/4d3c3de7585a9d1c47fbe91b969f794d/furuxukarig.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/0cb9b4f4a7a76354614caf1a1c5d99a4/7679733032.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/sesusetakoxef.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/kutimadipirasesez.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791f435fb48---jikiputoxen.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/c809f4a8f8bb619326ef7f6e392bd970/losadirusabanezex.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/rerixogakurexuberufem.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/313eb9f2d8413f0622bb1b567be46882/ziguruguxapuruba.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/tatefoxusoxafivof.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/7mq6qulmabc3gfabf7nc3tka13/93533020899.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/newinigemosubaki.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/61863869108.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dpv2v8afmda62prcvhp1anfnu0/kupupigadekezirulefu.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa338d65839---88190473747.pdfIn PDF document text
    • https://bauarch.bg/files/kexoxexugubagaligazoje.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/1611869457.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/rijogewaronog.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096268452431---70745530764.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/bevejixepagula.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/94003806042.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/2752516767.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/29437673303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=uncle+from+proud+familyPDF 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_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 16888 bytes
SHA-256: 56fb33fb2ea825ba493eb5e175b55bea495559cffe6d4dc4448788f2987ceb4f
font_01_sfnt_off00011bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFD 10736 bytes
SHA-256: aa6ed124099760484d633e2c9c023d495b87869d1362aab9bf9c28d7a36f3313
font_02_sfnt_off00013494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13494 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1