Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce194b208ab36b56…

MALICIOUS

PDF

78.2 KB Created: 2021-10-27 21:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0af8956bee4d7b15aa0b58e207c4907d SHA-1: 23991e970985bd604184a149542048a5354b31cd SHA-256: ce194b208ab36b563853565c61ba4fbea409c96964a5fd2cbdff20e3b1d84262
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to external sites, and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests these are used to obscure the true destination or for SEO manipulation, common in phishing campaigns. No scripts were extracted, but the overall structure and heuristic firings point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://mayingiabao.com/upload/files/77428860138.pdf In PDF document text
    • http://dribblebar.pl/userfiles/file/ginimugewufirexa.pdfIn PDF document text
    • http://santabruna.cl/upload/file/53253126374.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/661870305.pdfIn PDF document text
    • http://drironcat.com/images/file/kixosoronib.pdfIn PDF document text
    • http://tecksco.com/upload/files/8479935690.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/kudetadepiruguroxoworub.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/47546493848.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/68854663317.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/43249985335.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/dagetanamuto.pdfIn PDF document text
    • http://foodchemsino.com/d/files/sovureradugex.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1617148f81bf60---xodewejinurosig.pdfIn PDF document text
    • https://vos-web.nl/userfiles/file/84016914839.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/54756723337.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/6201466188.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/girovufese.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/sibifivo.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/78005374797.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342f96bbefe---vixidu.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/rinadunopawuloninodel.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/lagaf.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/4313547086155a4f90f416.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/mijodefenub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/896FEnmJZlk/uplcv?utm_term=phthalimido+malonic+ester+synthesisPDF link annotation
    • 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_off0000cc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3C 10748 bytes
SHA-256: 0b71377c34747dac6f6c5a6c48ee98119af36c329337f490962519ae735bc87c
font_01_sfnt_off0000e4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BE 17716 bytes
SHA-256: 192fa98f06d0259b5663a29489cb69dffac270cfb9e72eb0d9b9d5c16663af1b
font_02_sfnt_off000112b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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