Malicious PDF — malware analysis report

Static analysis result for SHA-256 590f7cdd8fb39a0d…

MALICIOUS

PDF

83.7 KB Created: 2021-09-13 22:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e70cf70fc6bbb641744f0b8a3139cc1d SHA-1: c0c85a8396ebcb451e4ebba8289f064c1be652ee SHA-256: 590f7cdd8fb39a0d82f84d3c2b118da9f4b3297c0a0d6f5779f2ae8caf637469
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised WordPress upload storage or are hosted on disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://garmaclima.com/uploads/ckfinder/files/40882589318.pdf In PDF document text
    • https://abyway.lv/images/ck_images/files/wazikumojukudem.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/luwivekazeleda.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/10085768883.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/63645111378.pdfIn PDF document text
    • https://adikketiga.com/contents/files/44240774412.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/38679608707.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/79939625350.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/guxosowobowufanejitositir.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/56972259553.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/zizoliwegupura.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f4eb1df97ba871c5db32ddb6dff725fb/lupoduxakujor.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161383031a4a2b---22208038050.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/61420884999.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/49714892217.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310b8b99ffa---18935719010.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/nolawobexujefubadovuwozu.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/durotideso.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/mexaderisolojibomixiso.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/66800817239.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/23595983574.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139067074001---vipatuvinunebagunat.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/c74e31e57c1d36a5077ca06b16f45728/45532044237.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=wonder+woman+1984+full+movie+download+hdPDF 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_off0000dce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE1 11104 bytes
SHA-256: 4a49fa72ed917d6642d6a540b5093d475b1791eeefafb4c0dacdb775067cf043
font_01_sfnt_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 18984 bytes
SHA-256: e3dee103a1aaf2d0c00551127d68e76539237a4279b71952cd404e3698e12436