Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5f9121db3cb2aa…

MALICIOUS

PDF

42.9 KB Created: 2021-07-31 10:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 5cdd823b3203fb4ac82663964cd744ae SHA-1: 6b0d2e9ffd169fce437de78fb6b3dd4b7d8398b6 SHA-256: ad5f9121db3cb2aa6bc08fd04ceffa6e850698627033fb1ff253591c7231ca9e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable links. The heuristic 'PDF_IMAGE_LURE' indicates a typical phishing shape where a screenshot hides a clickable button. Multiple URLs point to compromised CMS upload directories, suggesting a link farm used to distribute malicious content. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c27c2d639c3---figisirenapimikavofowizo.pdf In PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/5620012919.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2afd012d8f1576090c85f4cd9cd7d6b7/guxinojatawodimubirone.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/mimitukudoga.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/57992863753.pdfIn PDF document text
    • https://bursac.net/userfiles/file/pisamefaturemepuzufog.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/tenojogogekaxitawi.pdfIn PDF document text
    • https://ms01bet.net/contents//files/dunasofanamazi.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/54461063604.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607893c8dbea3---vozusojarafanojulis.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/25779527213.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/6233375840.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/f6a603a768de3ff79569c145f42aaa59/xapolola.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/75b2d00a1ac68b8801aaa72bca03673e/jumevaxawov.pdfIn PDF document text
    • https://semut73.com/contents//files/gowuzekobif.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/kedirawajugetusudasa.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/n52seiruhvutuu2qov3o85ah1l/nufigixosoj.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/2b1a29107da483f4bcdc46691ad949de/wesir.pdfIn PDF document text
    • http://willbramephotography.com/ripenukavewosufemiru.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/78757350936.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/bimasiweropedomikaj.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ed93ba531b2b33e4c85557c668ba9dc3/kefig.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084fb8095598---97285067592.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/belawufebakiv.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/vixanuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gift+ideas+for+first+periodPDF link annotation

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