Malicious PDF — malware analysis report

Static analysis result for SHA-256 134003264243b13d…

MALICIOUS

PDF

77.6 KB Created: 2021-09-21 01:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 93adb55e7c0fd6b8add224169e516279 SHA-1: 652e00c1f3cccf457cd477d88c334f158a672dee SHA-256: 134003264243b13d9b0c6311ab828d9674b41d5f5f1fef4ebe2a84a60dc40680
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content. The heuristic firings indicate that the PDF is designed to host a large number of links, many of which are on disposable hosting or compromised CMS upload directories, suggesting an intent to distribute phishing pages or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5392

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://nomylo.ru/uplcv?utm_term=star+music+vijay+tv+show+time PDF link annotation
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16136824610da7---daborobivulupetiputusepis.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/wewuzavorenoxan.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/80433d655a3eebb226e68d41b44d2887/xozurumidumafebanos.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/gixul.pdfIn PDF document text
    • https://yasacompany.com/upload/files/junewikaguxu.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/37291156844.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/f6b71ce6db981885abb8501e53309cfe/solosazute.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea6229f70e---wozeluxakeze.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/8280061134.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/9106066219.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/83504304009.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/95822737222.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/69859787451.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021090913590273499.pdfIn PDF document text
    • https://12shio2.com/contents/files/toduvezanopamekisaw.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/20504239450.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/12658613584.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/13560452131.pdfIn PDF document text
    • http://tzsunup.com/upload/17541103794.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/gugapopekiwifegoliwid.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/mavogupobod.pdfIn PDF document text
    • https://adikmanis.com/contents/files/43539629674.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/63278580554.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/sojivor.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/disitipimivaborebawedo.pdfIn 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_off0000d2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 18368 bytes
SHA-256: 7a861b54bd0a28dadb7c8f6f6dbde8d8e4ebae4b53ce4eb63ebc6e3801a33b9e
font_02_sfnt_off00011acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACF 10916 bytes
SHA-256: 01621c6397e649bc56c9bd8be500d0f6e665fe52d49df3c2a5eb9c54b598adc4