Malicious PDF — malware analysis report

Static analysis result for SHA-256 1076094031decc2c…

MALICIOUS

PDF

87.6 KB Created: 2021-10-04 18:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0e37823ba4bd5836d1e4c67387b03774 SHA-1: 86874b14bbcce63a243d65d492da3eee368ba0b2 SHA-256: 1076094031decc2ca3f3e0321bf52477ee20a28de14c19c40a3d5b3e75d01259
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and the link farm heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=accountability+smart+goals+examples PDF link annotation
    • http://provia-events.de/pics/fotos/1/file/41167861628.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/medesavuvomuri.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021092605201776.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/48956066817.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/5582131651.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/33503948229.pdfIn PDF document text
    • https://sanagustin.cl/files/vosobipowegajisepazux.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/nilepaxoxun.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/65255584072.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-26/20210926064540215108.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109041324209522.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/57794237302.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/jotidasadiso.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16138c400da51d---fupusuguda.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131072031407---bufiganakuzedetodo.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/zotitefomizuxa.pdfIn PDF document text
    • http://ccadl.com/files/20210926211158.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/jotukazovip.pdfIn PDF document text
    • https://shiksha24.com/userfiles/files/dabimunaz.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/vuwixukawun.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///ruvixepevakimogekob.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/beviro.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_off0000ecd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E8 11156 bytes
SHA-256: 1faf17245fca86d010ade25e1f352bcf7e6515e32d6bd272fca6e34c471d078c
font_02_sfnt_off00011ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED8 19548 bytes
SHA-256: 0b2b3eff72dfb253c0c6e05931b8bbe35a8a51062480bbfa16d9ffcb727131b8

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