Malicious PDF — malware analysis report

Static analysis result for SHA-256 e910b906426e7540…

MALICIOUS

PDF

54.6 KB Created: 2021-09-18 11:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ed0cacdb0b3d5f37aa93806d5dae2c67 SHA-1: eba4763bbd03ea198fa52138c5af6930f72c4050 SHA-256: e910b906426e754017d1fc8f030ad3a4e1b634cd6023b6778c330365671f12e1
94 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous links to PDF files hosted on various domains. One heuristic specifically flagged it as a link farm on disposable hosting, with a redirector utilizing 'utm_term'. The embedded URLs and the overall structure suggest an attempt to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4703

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132121141210---zukujez.pdf In PDF document text
    • http://movitecnic.com/ressource/site-image/files/jatez.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/69617495710.pdfIn PDF document text
    • http://plncse.hu/php_data/file/fanosukizo.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/fadanilonivalis.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/40872295010.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/kibipodujewedipobi.pdfIn PDF document text
    • http://vector-food.pl/userfiles/file/10614489614.pdfIn PDF document text
    • https://khanikango.in/file/66670778727.pdfIn PDF document text
    • http://flirdining.com/uploads/files/xidolomijazadezomelojo.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/jonudovamikimusixufaxene.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/92769217336.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/lodefivenuwupumufoligixez.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210909_2E0DFD684ECBEB13.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/20707902249.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/fopejunomenasojuwados.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/xusilazirofi.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/bugitiludufo.pdfIn PDF document text
    • https://chineseclothingonline.com/File/18400654581.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/resebadujurabufaz.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/79759793861.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/tamurapolo.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/d3fbf0d2499e13fbe1f57adc85141348/69006760464.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/43295213262.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/18363270108.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/14674826444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=not+all+contacts+transferred+to+new+iphone+from+androidPDF link annotation

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