Malicious PDF — malware analysis report

Static analysis result for SHA-256 382e17d44df5fbe1…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 04:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 815f98132cc41e1737ae6fc895a8f47c SHA-1: 95e97c57bafb7ff4ed300f7c46797f04bc175a96 SHA-256: 382e17d44df5fbe149773e96d0d27e30fa810dc2b9abe49045b46f544ad87824
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allytemp.ru/uplcv?utm_term=band+vaaje+movie+online PDF link annotation
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///36901326309.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/pevawumepiwedu.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/xofejidujosa.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/vigivilivagesurutu.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/temikirijirir.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/dekozilowasapibelebewez.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/56504538369.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-17/20210917084852439020.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/bofizito.pdfIn PDF document text
    • http://webs123.com/userfiles/file/lebijoxowidedipeju.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/vozif.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/e340213887281dba5d1c763cf83b508c/vexakagisexujegeju.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/kibajafitusi.pdfIn PDF document text
    • http://ovstav.cz/app/webroot/files/files/47825312760.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/66352814311.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/bibos.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/40069935306.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/53366180526.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/69979534136.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/natafuzesulajikuzapitul.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/87726837599.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/bodawuvowodatutogikamu.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613f00e2016ae---75002557308.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1s3lf9udnu8jvp8m4iqubtocm4/banata.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_off0000d955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD955 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 10292 bytes
SHA-256: c0283df462ab78f39b8f1561be2461e8450daccb55b5635cd8a30b54ae76c323
font_02_sfnt_off00010878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10878 17272 bytes
SHA-256: 7487269c6d0e0bb4f8171f378ec78646652ee8a8a49a3e878475d7546d59a866

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