Malicious PDF — malware analysis report

Static analysis result for SHA-256 81096a227fc945f9…

MALICIOUS

PDF

58.3 KB Created: 2021-06-10 08:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33a83c6bd39992761a20ed19d9cde77f SHA-1: bb18de0bba09dbdf8f6bbfe544ea53749a948382 SHA-256: 81096a227fc945f9b588a80c58aa40f77598d576c212b8bc14a9a2f5c287212a
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm. The presence of 'utm_term=black+ops+1+apk' in one URL indicates a potential lure for users interested in specific content, likely to facilitate phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=black+ops+1+apk
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/171fd9fda8547cda4460fc14f15f7f40/nejowofak.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c87441ffa---sasoviz.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0397e137a8---venexukewele.pdf
    • https://landi-bg.com/images/file/21327453763.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8debp4h7lf9d3jfnd91ui7h98j/supumiwob.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a31021bef93719ee530186a89c4d92b5/goripu.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/1a2e848ae67cf1138b2c692377d8e738/77742920611.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f180473bbc59467d271ddddc66f9520/kinekeraw.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7c180c8b5---13056861846.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/8629e25cf267f2f6bb6676dddfd47c0a/45042055667.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c712e652ff---27068943624.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a03972d0581---robuvugoze.pdf
    • http://mynigaoe.com/upload/file/20210602211827.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/c49b91f7a72135475b32feb07a51ad03/xaxagofogenevopukapo.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160842c05f1061---98562426071.pdf
    • http://edu-family72.ru/content/images/uploads/file/fatep.pdf

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