Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34f55928a9ccd95…

MALICIOUS

PDF

58.2 KB Created: 2021-08-29 17:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 26afaaf410336a4cf2ec88eaf323116b SHA-1: f15fd7002bcb550a02f81e8f0f045bd5bc97110d SHA-256: c34f55928a9ccd95bacc018f7b9187347ded9c8ff8eecf7a88f2d7923575e29c
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to distribute further malware or phish for credentials. The presence of multiple compromised CMS upload links suggests a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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://iringmalaysia.com/ckfinder/userfiles/files/32614323883.pdf In PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16115d2aeaa8cc---simoluvumu.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086829b47e0f---vodimikepategebod.pdfIn PDF document text
    • http://katachizu.com/img/news/files/zenumad.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/pititozudujul.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/rodolama.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/rivulapanu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086fe621a06c---lujivux.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/lorizixafigesugajoduzozi.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/jojiriliboviganek.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4e03d8dd6---tiwutemogezubapelojajeji.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8e244072e---desun.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/40019911309.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072eea680fa7---424321146.pdfIn PDF document text
    • https://lordoptika.hu/files/files/9080058353.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160c949edceedb---27354447921.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/12284251ae99799edd9bb6e3f0297514/tafamax.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/143446897.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/bujagubatigesif.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/53945244767.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/nigesores.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/24112014686.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/18878855168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=have+you+ever+kissed+a+guyPDF link annotation

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