Malicious PDF — malware analysis report

Static analysis result for SHA-256 939c9b880f939113…

MALICIOUS

PDF

55.3 KB Created: 2021-09-05 11:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 56fe5b961f527783d93b1e67fa0e65b4 SHA-1: 7ee55add17d7bf6acb77b572665c6c389aae186b SHA-256: 939c9b880f9391136ed7817c2610e6c95d24d0b4e4a726e4a2a0366a3968ec72
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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://huntic.ru/uplcv?utm_term=mekanisme+pernapasan+dada+dan+perut+pdf PDF link annotation
    • http://englishplanet.info/ckfinder/userfiles/files/31214685638.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/d3099feb000b8480031516cf36554d4d/72649745626.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ab46dad19---ponulunivakanope.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/48679878353.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/22468955865.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7e6372fa1---59692581875.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/73897119270.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/74525943382.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fd1364157aad1079f5612d9017ea54bd/79981285699.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160850e4251b4a---jelewiboduserunipujatal.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ri411sonjod8igaoe7j195knfs/dusewoketotenirotu.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021060917351122.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/38811397447.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/25779829002.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7084a0065e630dd510d78bc0a3b16de2/599675801.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b2a7ba1f3---jezodokobogesivawujote.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/47665451094.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/baxekisukolurojo.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/94b25666fcb1152e9d6fe6d5c3fc2c73/kipupudu.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/ac3eb7e64d42bdd3bdd80cc377d7033b/mekapeti.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609448943ec92---87263405820.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089209f676c0---fepipadolivorewu.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/56829748548.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.