Malicious PDF — malware analysis report

Static analysis result for SHA-256 0178ada664bfebac…

MALICIOUS

PDF

82.6 KB Created: 2021-02-03 03:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7e12b386765f2ad5aa7111271f7f2f57 SHA-1: 1ca718cfaebf898a2df2e5edfaaf8519c04e955b SHA-256: 0178ada664bfebac9565905577e9b37f89b8a8f5dd55d7abc5c1fc2f4c028c3a
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://yafferge.ru/aws?utm_term=wondershare+filmora+templates+free'. Additionally, it exhibits a PDF link farm behavior with numerous external links, including 'https://s3.amazonaws.com/gavapozalilup/65463737756.pdf'. The ML classifier also flagged this PDF with high confidence. These indicators suggest the document is designed to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/aws?utm_term=wondershare+filmora+templates+free In PDF document text
    • https://fojomifurinu.weebly.com/uploads/1/3/1/3/131378835/52426a72efb.pdfIn PDF document text
    • http://maewallace.com/relations_fer_et_ferritinetu6bo.pdfIn PDF document text
    • http://kvyovk.xyz/88013539772pdtci.pdfIn PDF document text
    • http://toselarasomax.iblogger.org/wugelonivojopefajitinew.pdfIn PDF document text
    • http://tamakar.xyz/32369075701i4q6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/65463737756.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/chunky_platform_70s_boots.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/29739284721.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/joweduro.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/calcium_lactate_formation_in_cheese.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/31332934787.pdfIn PDF document text
    • http://musarozopod.rf.gd/update_weather_report_in_kolkata.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/pofetupabawipazoluz.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/gijagipe.pdfIn PDF document text
    • http://pususarejopo.epizy.com/57453843076.pdfIn PDF document text
    • http://sekovukubetib.epizy.com/49565926507.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/movie_ardaas_karaan_2019.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF97 5292 bytes
SHA-256: 2d731bf1c2227e1423b2456bf51826037fb0d4762360ef1243ae5612ef638fa2
font_01_sfnt_off00010173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10173 3736 bytes
SHA-256: 3479ba819e5d9a231af7c03afda0bdee020ed0f7218c713b8666a6f9a78396ec
font_02_sfnt_off00011008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11008 11612 bytes
SHA-256: 509db3af28a77d9b13a65833676f72cb09f24217e6b581a3849801a60dec4065
font_03_sfnt_off00013788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13788 16060 bytes
SHA-256: d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72

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