Malicious PDF — malware analysis report

Static analysis result for SHA-256 196ba47b20365ee7…

MALICIOUS

PDF

82.6 KB Created: 2021-09-15 17:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e543d272dff33458496313b8ffd59816 SHA-1: b670f056304c84ef7b925e4dcd5e03dd6e2806c1 SHA-256: 196ba47b20365ee7bbca5809dc84900a230b905ba9fdc450ddc3a54bffb90cc1
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=cyberpunk+mod+apk PDF link annotation
    • http://air-con.ru/upload/files/52699425507.pdfIn PDF document text
    • http://abc-tel.ru/data/File/30352926616.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/wofupagukavemilose.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/valubasadojewawofikirewod.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/pegevijaxitakowirokimor.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/sewixajobivipalokil.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/gilikazikesuxewomapigono.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/35227350103.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/fobuvuvaxoxugatidaperiver.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613573fb887bf---zadagorusowulexomub.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/38025102376.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/pibawasovarujugabegipevi.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/zapepogolenosiga.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210903061149.pdfIn PDF document text
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210915095726.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/42226041404.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/68763536678.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/13661455321.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/wewojusutaxatabawiz.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/liwilasibojenemolezusuw.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1a4r3q0868u54otdqeaj74okfd/siwavuginafabutekonuvito.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/74997844043.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614172a9dce5f---rejebob.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/konirexidofe.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_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 17968 bytes
SHA-256: a84bf0b8195665bd5b2e0799f17acf66d38a5dfdd32c5af0cb0617735b77c4cb
font_02_sfnt_off000124a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A6 10624 bytes
SHA-256: fe94f86f28a8030d157e0c48b6471852c84b8ba1e15d8d625d8666f2becd4a78

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