Malicious PDF — malware analysis report

Static analysis result for SHA-256 93697b11c73f39b7…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 13:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3cfb41185f0034ccbe648294d40938ad SHA-1: dd25ab4aee33b0b6794a7ba62782f8531103813c SHA-256: 93697b11c73f39b776cc8f6bf9800bca4407f852a4995e2b0520ec3960f9b115
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://playindiano1.in/ckfinder/userfiles/files/vigatoneludupugifikileviv.pdf In PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/ziduwudejozezo.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/3468054183.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/80653128144.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144d87170da2---duwurejitom.pdfIn PDF document text
    • http://onhimalayas.com/ckfinder/userfiles/files/29635448701.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161458ebeab4ad---begamelafaf.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/rinotezexajinumimedikumif.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/53858120886.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/lifiradaveteposuzez.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/52224405988.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/pivekatatibexuki.pdfIn PDF document text
    • http://selidbe-beograd.info/files/zugasomerokogidamul.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/41078248382.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/66590432398.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/zuximatevesixaba.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/10743790259.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/78697809334.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/mokowija.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/vemawajobodexanusozat.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/gajix.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1b6a7eebd---vojasavopibi.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/nujugisodujin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=ben+ten+comic+book+pdfPDF 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_off0000af17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF17 15740 bytes
SHA-256: df048d3b730646928256a127384802e7adfc09f95cedd69271be667a1dd62609
font_01_sfnt_off0000d74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74D 10588 bytes
SHA-256: b618297207df0ad251a46cf8e38416ae29a381252b5bfd6314e1c6e5337213c3
font_02_sfnt_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1