Malicious PDF — malware analysis report

Static analysis result for SHA-256 112e6547e9e63a25…

MALICIOUS

PDF

83.4 KB Created: 2021-09-16 11:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f6558f192288bc8982d99f0f63c4d7dc SHA-1: 0548d692b48aa333358e8762e3cbea071eac803d SHA-256: 112e6547e9e63a255e91e8c27913b478023aaa4104d4c6a6827d6393d483234b
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The embedded JavaScript likely facilitates the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier clean score 0.1682

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.
  • 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
  • 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://medvor.ru/uplcv?utm_term=the+new+mutants+free+full+movie PDF link annotation
    • http://bsa.by/ckfinder/userfiles/files/37658219942.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/222201000.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/kcc1uf9i4hdia97m9pdcbgd9ip/1510167847.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/95621004223.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/fanaruvar.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/jofesavufa.pdfIn PDF document text
    • http://upakuika.com/img/file/67874340211.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/sosulubedobopixim.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614218c862650---davorudurogeveweka.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/lagixukitewuvujutujifozaz.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/sidutibegavulokopoxunej.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/64576557507.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/nezejeru.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/bizuxugaragokupudawobutu.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/pabajikorakadow.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/zuriliwepijiris.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/kdg2gcd1fuh4jqe65umic0lc7k/lusemomavotexozajofonotu.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/jiwumiva.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/7358698154.pdfIn PDF document text
    • http://mq-water.net/upload/zipazaxoperatenokemar.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/738e1b5795b3dd37b29d3b3043e27f65/77235463987.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/javobivetelizireboj.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/72320908262.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/86452591926.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/tiregaxojejarixowuzir.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/91453515750.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/fixenazetewatufevarogak.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 10696 bytes
SHA-256: ae0c96920f52e8c0ebafe0b3cb6b6560cd15399d29b789ba18f1c31a1f162360
font_01_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1