Malicious PDF — malware analysis report

Static analysis result for SHA-256 8925cccb853c6ca5…

MALICIOUS

PDF

71.1 KB Created: 2021-09-24 13:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f21ed0b37dac661adab6e4f476960742 SHA-1: 836e29287790c4419b6d1a5dc4314bb8f8441f2e SHA-256: 8925cccb853c6ca5cea725db04aa756d2e757d797f342b536f046b167f1a350d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of embedded URLs, many of which are hosted on disposable domains or point to compromised CMS upload directories. The document body is heavily obfuscated, but the presence of numerous links suggests a phishing or redirection attempt to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=kung+fu+panda+2+full+movie+123 PDF link annotation
    • http://nt-module.ru/ckfinder/userfiles/files/67823889907.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/44599426818.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/gepebavegukozikosogiw.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/25919857323.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/dufiwi.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/juvivipefudebugelo.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/52f582b6d9616cf54912efe274aa7e6c/witivuzoku.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/48920344077.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/berepagujitubalotali.pdfIn PDF document text
    • https://greenfins-thailand.org/uploads/file/parudakesedidunaneve.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vu4abru841bu5avk2d44oloh66/43382437612.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210924_BAA0F793CB014DED.pdfIn PDF document text
    • http://gibisch.com/files/files/kituwiludilojufabowipive.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4c0f484c4---fumonazagikoxidosisekobuw.pdfIn PDF document text
    • https://adproissy.emailingmanager.com/uploads/editor/file/siwimo.pdfIn PDF document text
    • http://inistor.com/ufiles/files/kuwaleduket.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/63467982510.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/36460793978.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16148eacbdc10c---52188201247.pdfIn PDF document text
    • http://imoroz.by/upload/file/dufowowukobupijofo.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/49696414708.pdfIn PDF document text
    • http://artio.pl/files/files/lalavakesalezivorunedi.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/80599484232.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/zugixagowoj.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_off0000b047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB047 10976 bytes
SHA-256: 98e73a1089e3d53bb2edf2aaebb9b12da5280f1ea03d7357209e4ac434448a33
font_01_sfnt_off0000c99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99A 18108 bytes
SHA-256: a9ee5b8bb1465fcd84df2baa4d9498e5989e3b073acf6a3728bc30a3703502f8
font_02_sfnt_off0000f707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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