Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3bfe1cc06d3ffe…

MALICIOUS

PDF

68.1 KB Created: 2021-09-25 05:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06e299cd63a0a838b4882647a9bb3644 SHA-1: 8d00743ca843c2de4d4f869ee42e12fb9d9de965 SHA-256: fe3bfe1cc06d3ffe4de5a33c7a8d0a9ac42403868664aedb83d2c852e71ba764
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The numerous external URLs suggest an attempt to redirect the user to malicious sites for credential harvesting or malware distribution. ClamAV and ML classifiers confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://garglob.ru/uplcv?utm_term=demon+slayer+movie+mugen+train+release+date PDF link annotation
    • http://hanboo.cn/Uploads/file/2021091123563870554.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613be06d301cb---4565464372.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/91566807923.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/65102130875.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a35faaaed059a512afde3faf1949ffbd/45573601540.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/zotaridikijagelob.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/rerumim.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109151221272663.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/zekelawukukob.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/3a52b8a1897680f91c525abc05d3eae5/75335957963.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/54475799362.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/lolojinowozuwikatopi.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/dotesetawuzonuxiguxa.pdfIn PDF document text
    • https://equimat-cheval.fr/file/28085196493.pdfIn PDF document text
    • http://j1ent.com/userfiles/file/20210916135123.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/31090033680.pdfIn PDF document text
    • http://arsvet.ru/img/upload/369399189.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/4818855885.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b1f35861366923206b4c25531d7095eb/23786802935.pdfIn PDF document text
    • http://parfumland.sk/upl/60295778267.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/46494547176.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/46655501858.pdfIn PDF document text
    • http://www.bash.cl/media/file/pirixuninawuzobudazep.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_off0000ae87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE87 10872 bytes
SHA-256: 1d092017e97efe6d64d11422dc0661bf8d0c4e303baf1c3c839c5e32106163b5
font_01_sfnt_off0000c773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC773 14164 bytes
SHA-256: 816cc143d69a5a1e83b4876dd92d5ac8b8270e9c15655f44cb328dd597ca972b
font_02_sfnt_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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