Malicious PDF — malware analysis report

Static analysis result for SHA-256 388d192f25eaa888…

MALICIOUS

PDF

89.1 KB Created: 2021-09-01 15:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c6916005ba7de65303370fff59ccbc8e SHA-1: 57bbbf5270e5272abe0c5ebcc86504de1810a3db SHA-256: 388d192f25eaa888aca8fa863e4394c2a0f0c5d5e8d52600beaf3c23dd47ebcd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and a machine learning classifier. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm or phishing lure. The presence of 'utm_term=go+giver+pdf+download' in one URL indicates an attempt to disguise the malicious intent. No scripts were extracted, but the PDF structure and numerous external links strongly suggest it's designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://wastran.ru/uplcv?utm_term=go+giver+pdf+download PDF link annotation
    • http://wohingltd.com/userfiles/pozujewikivabalukafaga.pdfIn PDF document text
    • https://servicepapik.ro/files/14947063146.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/a2eb850e151278161b050bed78419c55/zunesatogudafitexuro.pdfIn PDF document text
    • http://styliststudios.com/imagesTE/file/fupekadar.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/66551674684.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/leriribuvakeguziwufab.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/46627149182.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/xuxovarovanututalanu.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/95652008734.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/15327101196.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/0nmetu01sm47qtmbvf1nfh7pp6/lunojixoxototisoxi.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/716f08ba75650f6064ef7022aec4b5ed/widizejobidupavosopusuvi.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/zuvazolizuzogirer.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce4bcdbcd4---67336130523.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/90531864558.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16088012b069ce---bekokekakizu.pdfIn PDF document text
    • http://cristalensi.com/public/File/jisijopepewiwezezagetixox.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f07c9736a---41425902465.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/74662200981.pdfIn PDF document text
    • http://simoncaulkin.com/images/xigagofezeserazefinivu.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/63558349282.pdfIn PDF document text
    • https://nomortiga.com/contents/files/15656827153.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/699576012.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/da7r2dbtrsgkk71oblmut9uc7u/nubesunepus.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/wawatexemivufa.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_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001106e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106E 10600 bytes
SHA-256: 985b98bc3b6fa65e7de8f5db4b81869456408e86aece22d22810e79d892813ed
font_02_sfnt_off00012898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12898 18028 bytes
SHA-256: 6bccdcf054e25c41d3a34e10b220a629c91038b961ac0676c58fb5ff75743de1

Open this report in the interactive analyzer, or submit your own file for analysis.