Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2298e97a8ff42bd…

MALICIOUS

PDF

70.0 KB Created: 2021-10-01 00:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 605ffc3e10a633d4b28a0ad3b2fcb09b SHA-1: 874da9dce46131e47b236ecf1948c89832d40813 SHA-256: e2298e97a8ff42bd4e84ff33a78fa458f2b75f2acd0cd3ed6ab2f224a0e46b17
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting a link farm designed to redirect users to phishing sites or download malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

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://malbreil.com/userfiles/file/jelusefivu.pdf In PDF document text
    • https://alkathirilaw.com/userfiles/files/wejavegonedaborivavosuf.pdfIn PDF document text
    • http://samtle.net/ckupload/files/vakozisuvomudenixi.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/34795985373.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/75415114039.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/gunejajakufeme.pdfIn PDF document text
    • https://costarica4d.com/contents/files/50156200864.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/73550945902.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/57658678351.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/30770868223.pdfIn PDF document text
    • https://portoggitter.no/content/files/userfiles/file///55208415516.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1633037117.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/47675400685.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/98164495483.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/36818116516.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109210508461407.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/94908d57e698fb479a1b32c3f023e0eb/48072836723.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/79209309871.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/dobaf.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/mekazelikudavapu.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/runajukejodiruk.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/75528406481.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/35181179599.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/4b86837f294a312b94c6c3f1b7dc4fc8/56928048749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=subway+surfers+mod+apk+latest+version+downloadPDF 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_off0000b227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB227 11332 bytes
SHA-256: aad02e7c26e19368c9c5f8793eb6e857ad7b9097837ea813826e5be0f580ab46
font_01_sfnt_off0000cca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA4 14716 bytes
SHA-256: 893f9770449177a4591ceb369de155586d6e2c69e2f1c5a9127ac3a4bce58b6e
font_02_sfnt_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1