Malicious PDF — malware analysis report

Static analysis result for SHA-256 075fafd95f5a9999…

MALICIOUS

PDF

110.3 KB Created: 2021-06-25 01:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b6ae11de7b676f00ad9614a9aeba4e8e SHA-1: 003b5c8ff239be44fdfeed162fc2f40537de1342 SHA-256: 075fafd95f5a999912398d06f6109525685bd463b7e429ca78702bce58a8aa74
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further support its malicious nature. The document body, though heavily obfuscated, suggests a lure related to online gaming, likely to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=how+to+spawn+a+tamed+wyvern+in+ark PDF link annotation
    • https://gachbinhduong.com/upload/file/dovupuvukevabosurop.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/47773421477.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609519c2cc7e6---dabupekojirik.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/t76plmknp3nb44aqvp7enr8rjp/vinasoluvusipuwuxad.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f3e2f13b6---jatuvegigoritekaxaruboxis.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/vetimojunodita.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3157c2f116---88053506148.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a046c25347a---nigagi.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f20e089d0---nomojepabisitu.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f893d54ae---bajedadebafonatopasezuwuk.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/pugewizedonezijo.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5d41b2f30---bezifufemodagekipel.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/81407be7a31deca2b6685329bba3e3fc/fufomezuj.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/borimepaxuj.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/80833038551.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ouof7m8vqmj1rhvh8khs7csgd3/bomad.pdfIn PDF document text
    • http://charivne.info/images/file/tujiropelofek.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab1be5fec2---vasibesopazojibidukapege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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_off00015c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C53 5352 bytes
SHA-256: 63e379175955236339b943d6de6a97512fde759f61c244ce9bc75bbb86b5b60a
font_01_sfnt_off00016e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E8A 11700 bytes
SHA-256: ec85d8add83083c7e3c8c501828f0a450da2c16de446069d0a0cb849efc80fcb
font_02_sfnt_off000196a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196A1 16192 bytes
SHA-256: 1ff76b967cdf3bc4238cb8097aa9d4755c8fb5bd66c4cf01391f6e70ad1e9315

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