Malicious PDF — malware analysis report

Static analysis result for SHA-256 555a69261b5c320f…

MALICIOUS

PDF

78.9 KB Created: 2021-06-15 15:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 73f137d7d5a7d764359e8e7fecede73f SHA-1: e02fcf7888b57aa04e094bc04ce568476a627a47 SHA-256: 555a69261b5c320f7656974918faa7b22ba8cc2fe9b9d3957eedbdcfbe29077b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains a search term related to Minecraft, likely a lure to attract victims. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://crewmak.ru/uplcv?utm_term=best+sword+enchantments+in+minecraft PDF link annotation
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608da0399549d---lavimugepavamukow.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089ea44d1e35---92547768841.pdfIn PDF document text
    • http://1careglobal.com/upload/files/41548857390.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/ae466891bedc840f91d9a02a2ccefc6b/90669214376.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/43f969ff018c4bbe7456d67374b00d2f/zitenunoxesom.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/hpjsq3eur5ogqpo6bl9ur0ho4u/foxuborire.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/2070fefc3fb656aec6ae1ff18ba0568f/79205185643.pdfIn PDF document text
    • http://www.heksan.com.pl/file/22330088467.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/47448602693.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd490127d8---7198664510.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/97527096541.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4gf50v8o9t2517j8r2mtmi1efn/38884760126.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adf1821f8ca---xavetisatajexil.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/37128263904.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/02172845668.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/99c768ded066fa4ffcc85efb07e5149d/vopapowazug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 5156 bytes
SHA-256: 82d7358fc3fb69c862c10d249f838971b2a195b6d7d029ae8e0ec6b530efe831
font_01_sfnt_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 10968 bytes
SHA-256: 46219acbc5a694eabd07f97e5af919962bf71da16b31825c465a200b88f5e38f
font_02_sfnt_off0001204a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333