Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e6b44a08ea2eea…

MALICIOUS

PDF

76.5 KB Created: 2021-10-06 07:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 96461882ae0b66860f98e2be532e9085 SHA-1: ec30ec3a4471f90fc0055d46d90623b3376906e1 SHA-256: 84e6b44a08ea2eea61c5647fe6b457a00f90df2e4f97d6b599a5a5ba5ceb2c2a
204 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing or trojan delivery mechanism. The presence of a download button lure and the 'password-protected archive' heuristic strongly suggest the document is designed to trick users into downloading a secondary payload. The numerous embedded URLs hosted on various domains, many appearing to be compromised CMS uploads, further support this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/j1o9ouh28t6j3nsqmr00elf1ab/22218730773.pdf In PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/71558099398.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0c494f63d---96755502375.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/bolaxig.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109072023502916.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158bea954aa0---52628364389.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210905_350B62A693551AF2.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/wasebonabemobufaj.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/sokosokixobidivuvuwo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ahldk4nfgrmo995poof67g36p7/52891165251.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/95953966074.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/fojitefo.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/nujujenasapoperexitixip.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/39201999226.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/95429242079.pdfIn PDF document text
    • https://ezokniga.com/uploads/file/katonij.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/wemodevisagutazitufiboto.pdfIn PDF document text
    • http://tnetimes.kr/upload/file///semabuzovidev.pdfIn PDF document text
    • http://deltools.com/userfiles/file/sirutetupafo.pdfIn PDF document text
    • http://gysanya.com/upload/file/211004170529296279divcv8hv3gkv.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/58599601913.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/nuzamu.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/zakufapapagenuninulu.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/xepebibal.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614e65ac71cde---kunan.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/11176259736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=free+download+kinemaster+for+windows+10PDF link annotation
    • 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_off0000c8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B2 10844 bytes
SHA-256: 39b9057a2e4204f8e12edb39765aaba2d407c8173a86a3c38c3c9ccd1e962a8b
font_01_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 16484 bytes
SHA-256: e7975943ea476f120ef1c344df368f6cdb257afea6812596c80fc36090fea852

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