Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e93931491508f5…

MALICIOUS

PDF

109.3 KB Created: 2021-07-15 13:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a10e635c0b448aa8c224ef616abfcbc0 SHA-1: fba3c47675118a655df1560baf4661453b5128ad SHA-256: e2e93931491508f539b9835203ef5a6efd241274b228cfd6c20336e7d3cca2fa
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. One URL, 'https://nomylo.ru/uplcv?utm_term=probability+and+statistics+for+engineers+and+scientists+8th+edition+solution+manual', suggests a lure related to academic materials, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4097

Heuristics 5

  • 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
  • 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=probability+and+statistics+for+engineers+and+scientists+8th+edition+solution+manual PDF link annotation
    • http://sochi-polyana.com/ckfinder/userfiles/files/sabogeb.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/25144399496.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f5faba3ab---43160610336.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160892aeb2cf5e---zenujoxikutavupazi.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/22958942124.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca476e9b3b---fojefinizolifovusi.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/ffc5d54613772fe551663037d52fd8b9/42190459738.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/58f2a8a7cc8bb83fb4ffded408252daf/sepigeke.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/16751149765.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160758a7fb7b46---tejazagexil.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6180e24937d3cd6c3cd980241803dcc2/52213439898.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/041c24f7b804b66ac0f55fdc46d16b36/80417819660.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/ecf51fa66ce1a6ae930287b94c6c9a21/kusibew.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838ce485bf3---88984570937.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160982ff6cc2c4---bidivaboxusafe.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d643f0574---damufularukizulefifa.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/6ua35r9mv45agtsmaeqb7rnq6p/37843513954.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/39448396220.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc755473bc---gumibizuvasojaxu.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/a4ed38b975ed852fb492755144a1d97b/fepuwamowipefenufurol.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/jifanoparuzazimabolitipoz.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4ti50elfvjvj8gs6lvap5ivddd/soletigokobatajin.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/93e194d51f4dca7010d607523a1e2a4c/37068921203.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/35801625822.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52cc007412---71072691264.pdfIn PDF document text