Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ace03ec20f8b55a…

MALICIOUS

PDF

56.8 KB Created: 2021-07-04 12:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed2837fd67455fc766135306284ebd39 SHA-1: 60df3c4adc77174d82d79bd0315ea93e34018a14 SHA-256: 6ace03ec20f8b55a888e375b623d44f61dcdffe6844bf994133b6b52c4a01394
174 Risk Score

Malware Insights

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

The PDF is designed as a lure, using an image-based interface to obscure clickable links. It contains numerous links pointing to compromised websites, likely intended to redirect the user to a malicious payload or phishing page. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5005

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 56 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 http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/628706b12cc12518bb8a16a8d684991e/bomupuletatel.pdf
    • http://bettynblue.com/upload/fck_img/20210603/file/kagoviguzutemanatifulet.pdf
    • http://bajcsidavidfoto.com/_user/file/33182467366.pdf
    • https://iamtimeshare.com/userfiles/file/rowugesavekanolodila.pdf
    • http://digemnd.com/UserFiles/file/95102335432.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/b7088fe5b5fbf472508ec26508003373/merurup.pdf
    • http://wallsfamilyreunion.com/clients/876683/File/kigidapi.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759013ed25b---13340443513.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f8b9bce3f---43788088306.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3dd8001bc17bc317df674937f1b137e1/71646613215.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b038537e6c2---tifupibanoku.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74e9b1000---93227484946.pdf
    • http://usaoxin.com/userfiles/2021-6/file/digukaxapajewoxujakuxu.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/0c2e00cc1e98965bc2b2435d3bee47d0/1782059964.pdf
    • http://aryajob.com/user_upload/file/pejeg.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084b09075ab3---gekepanawusofamigolarem.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/0b6143dbbcb5991be72002a43bed9b5e/zenabixadige.pdf
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/faboxefixenixus.pdf
    • https://askisan.com/upload/ckfinder/files/20231720953.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f1d115013---zasip.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/wejukabuwexiraf.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/b05cbc8bed38c7e4a76be9ae8d4005f1/71479926354.pdf
    • http://ministerium.pt/files/numekowinaxiwesoxevaru.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=greenhouse+effect+is

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