Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5e32fd498c943c…

MALICIOUS

PDF

67.9 KB Created: 2021-09-14 04:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d2e8b1c2da3967d1e287b45fc17bba9f SHA-1: 0d88ea18132a97360f37437da23e5682c8465084 SHA-256: ed5e32fd498c943c7d9e9138ff91c2080f0573344a7aab0592892c13518178c3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external URIs, many of which are hosted on disposable domains, suggesting an attempt to distribute malware or phish for credentials. The document's structure, being image-heavy with minimal text and a click-outward action, strongly indicates a social engineering tactic to trick users into visiting a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/71054489537.pdf In PDF document text
    • http://giorgimpianti.com/userfiles/file/46052520253.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210905225100.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/93328169135.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/68280205277.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/20430853961.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/84587775167.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/kozabiwonabigudefes.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/wemesodibotezelimisoxipor.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/jutovoxexasutelaxapaf.pdfIn PDF document text
    • http://wych123.com/upload/files/36881165052.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/xekobomeretarosuvovorozev.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/sipinexupuwomuzonid.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/wiguk.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/23300054448.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/jexemoz.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/gewipovumenepevumegunifuk.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/55521150724.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131560208288---86331846906.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/difakezamofe.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/vaximejopinoger.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcdb530eff---99220789089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=in+shot+apk+download+for+androidPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/malumubexexerolobosow.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECC 14092 bytes
SHA-256: 1c3ef9fbe8f9583ec8e2e536f795a9ba80d9123d52be679a34206856376c6ff8
font_01_sfnt_off0000d1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 10592 bytes
SHA-256: 0e67bbbf7a58ee0e93d6ae2fe7a27e09fa188bde0db3f6eccf4d49944342ec45