Malicious PDF — malware analysis report

Static analysis result for SHA-256 99caceb3e2c50c3e…

MALICIOUS

PDF

77.1 KB Created: 2021-06-14 04:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f8372220e8d926ac33b869e0f2e68a07 SHA-1: cc3c221a68aa9f50a3894167656db24147d59842 SHA-256: 99caceb3e2c50c3e330ec6ccf8d4953d0be5e57cdef7ca789175ea31b127c311
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which appear to be hosted on compromised websites or disposable domains, suggesting a link farm designed for phishing or malware distribution. The presence of a fake movie lure in the document body further supports this, indicating an attempt to trick users into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and URL patterns are strongly indicative of malicious intent.

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://coretry.ru/uplcv?utm_term=baby+mama+full+movie+free PDF link annotation
    • https://ludifrance.fr/userfiles/file/raser.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/846907a4ccaa9976c496044703482cd1/medazen.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/lcigoh46om3hmp7p6qfauu0ien/rixudu.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/xulesufo.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/44863417746.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/71172481578.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f81495cfe3---96882535571.pdfIn PDF document text
    • https://aedwea.com/upload/foto/sekewulemotazunip.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/10418db2f59bedba58d29f0f65f04d0f/26185495049.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/pituvanas.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/ne0l1jqp2rpqa0bi2cgf3kq1cg/3775460226.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/d6i3j7qgg7bmls160rtd92suns/tepipusujuvebebezovob.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4e2e785de66d9bab5abb1bc70b0fc659/guratikekoduwubebovipexu.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c4844704c72a12172e17674c67ea8d65/lozomopikepolapal.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091021a1115f---95071725160.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_off0000e4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 4780 bytes
SHA-256: ebb1bc0247a8cfeb261998a835e58cfed55aa74042553f64559c296930e6b9d6
font_01_sfnt_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 10828 bytes
SHA-256: 4b6ec07a1699d2e579f38fe8766feff9db35a6450ef0ba2906c398790654956f
font_02_sfnt_off000119c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c