Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0255c8cfc2a498…

MALICIOUS

PDF

56.7 KB Created: 2021-07-25 23:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0f2cb941d3f01169095744e88171ce12 SHA-1: abb906f91af43724e7425b3bf979a3b316c7763d SHA-256: 1e0255c8cfc2a498c1f68e1feaa0739294eb2d6a3aaa1c3e488dfc9ba66e2a2c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8155

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://danielstrehlau.com/userfiles/file/14622087595.pdf In PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/hl5s4sd3meubn40oul9lf6ipic/90098865439.pdfIn PDF document text
    • http://soles2walk.cz/data/file/14417689292.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21782157883.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/nosituk.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/9607349da3fe70b79637bca17704c3da/pufuderazuzorun.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/f1fa5f2f03b2e98c81bcd380bf7e5bed/15187218522.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/48220454088.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/nokepidaxowobes.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/qogcqd2v3fhf3qguft2t93ocf1/45499671802.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/6151673c80a3e18670d932c3ca8b4fa9/37394594966.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/38761659811.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/telaponinoponunavata.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/7232271060.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/48785892711.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/zoxapusijazisegobajutoxe.pdfIn PDF document text
    • https://cargobull.cz/res/file/61735879329.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/2824202581.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/urf3m5keqdjidvl7cdtvo3hcif/zomotukilenozadezikomum.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aad6b460752---jegametotevimepawulogezo.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b838daee8e9---miwaxato.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/78643122047.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/4b81f8b2b022c1c65d4e92b73021680c/bolavirubu.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/repabuxepogoxunomosinex.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/1gh2sv20matf05m7904k6fa47g/sigivibowodevat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=basit+harmonik+hareket+%C3%A7%C4%B1km%C4%B1%C5%9F+sorular+ossmatPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4B 11104 bytes
SHA-256: c82cabe025e97e9e6f4317c09e078b569b71872536d4240ccf350a266064584b