Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7e36143238fc8c…

MALICIOUS

PDF

69.2 KB Created: 2021-08-28 17:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 87e4bb4945ef883c92e3f69a970f43e6 SHA-1: d59f11a2f6dc1fbe1ba660e2d0b0f87dfafc4980 SHA-256: ed7e36143238fc8c2a1333710e96d00d6098ec42c19cdf37bc3c0595c67ebb9f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be associated with compromised content management systems or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

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://garglob.ru/uplcv?utm_term=well+%26+able PDF link annotation
    • http://premo.at/userfiles/file/dixofanujaridew.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4b77664e7---72165835886.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/73289097927.pdfIn PDF document text
    • https://atl-50.com/files/file/24884442025.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c87db3f429---tigalevogosopasafinukixux.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/fojosutitikipevine.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e78077b31---68629345476.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/pakefavufexokupirosokapog.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/37001954104.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210803/file/levisok.pdfIn PDF document text
    • http://wahiclassof69.com/clients/874294/File/35024864817.pdfIn PDF document text
    • https://2winit.com/Files/files/26258009846.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/mefofenamixisabiwuvamo.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/sujivezirekuz.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/25112677259.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/32186521864.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/abdd1e4e5ef3e2926a3f2654d97ce5c1/muzeburavizadobow.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210611213143746.pdfIn PDF document text
    • http://unsersohn.ch/images/file/furuxuvuxideranetosiwo.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c935bbdaf49---rasemuferewunobomol.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/27782748428.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/52530809905.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/wasofodoziseluta.pdfIn PDF document text
    • 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_off0000d1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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