Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba18e4cf91b1fe28…

MALICIOUS

PDF

82.3 KB Created: 2021-09-01 19:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1bbde685ae511d6c079ab297945a6e7b SHA-1: 5101a92e53c0942d3d5b3e23b4a109f11cc37bd0 SHA-256: ba18e4cf91b1fe287363b5ea95e8ad6d848d068e8df54ae9bafb482d39c08a30
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1027 Obfuscated Files or Information T1553.005 Antivirus Escape

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The document contains instructions to disable security software and presents a lure for a password-protected archive, indicating an attempt to bypass security controls and deliver a payload. Numerous links to external sites, some hosted on compromised CMS uploads, suggest a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 10

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=synapse+x+cracked+roblox PDF link annotation
    • https://nnkcreations.com/userfiles/file/nizozakas.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/sifix.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/cpns2gddfkkr5u6rjnqschvof8/gavusaxadudujedupakusi.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-07-24/210724165944666546f5mgy1aehr3k.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0e739c0e5---25907866854.pdfIn PDF document text
    • https://bursac.net/userfiles/file/50187663949.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/5522247982.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/wexepufep.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/71116658891.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/sapemefixizisub.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/1e2021985b2a5335dcafe25a3427dbaa/buvewulovis.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/439590001.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/4u46uu2mnh00fteps4jonjp004/58887987445.pdfIn PDF document text
    • http://majesticcaliberenglishlabradors.com/clients/a/a7/a77fae3751d16767b5fd1969bdae34dd/File/livavovobe.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/39183497617.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/84202448786.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///vepixenaxukale.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/61701005734.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5a27df5ff---71573071573.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/68936a779b982231736ae6e5fbc85d6b/luneladu.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/kesavobumoraxotebofek.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/sg3lt0ulp1a0m84dablthhpb9g/933697424.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/131844853360b12511918e8.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/wugalojasegegi.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_off0000daa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA4 10840 bytes
SHA-256: 465556c8e9694bc88e60c03c4335720558b62fbc68b9bb99556ffe434056ba5b
font_01_sfnt_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 18300 bytes
SHA-256: b271ab40cd96be698ffe91261a46b40a517902724845551295054e13f2ae4c99

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