Malicious PDF — malware analysis report

Static analysis result for SHA-256 36208f62eccf221b…

MALICIOUS

PDF

82.1 KB Created: 2021-09-23 21:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7c2d71af2969e53b922152d13ecc41e SHA-1: cb5897220c8f91b80eb8ea1b0695f749d5919640 SHA-256: 36208f62eccf221b461a2e90abccc075e49f87c0ad7e71e26a2700823bef06fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to compromised websites or potentially malicious content, such as 'pokemon go hack mod download'. The PDF structure and embedded links suggest an attempt to redirect users to external sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://motodubai.com/uploaded_images/files/38416660027.pdf In PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/vilogufupizogip.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/44725145363.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136f4c251de5---74074974487.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/kikejamawitonisenererog.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/58403644288.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/notovepupoguw.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/bunibos.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210913034620_gmshh0.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/45070350804.pdfIn PDF document text
    • http://yejida.com/userfiles/file/52335728035.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/3540982927.pdfIn PDF document text
    • http://futboltotal.net/images/files/wamopowalozuko.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161368a5f41894---mexonop.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/26716778835.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/maximizaxalovabobekeg.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6fac1eb8b---94373734198.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/46189243123.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/busanevonulivoxofa.pdfIn PDF document text
    • https://chanty.dacola.com/upload/files/zujakaselezujodofoxun.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/18849530441.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/99696876582.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/75102671362.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/32965383994.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pokemon+go+hack+mod+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_off0000db35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB35 18376 bytes
SHA-256: dda1a2a1814b2b70a81ca56a4716776e3b2f99b8d78905dba93d74288b8edace
font_01_sfnt_off00010afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 10536 bytes
SHA-256: 02e9fd60cee2b18b5ab277564de7c8e5dafd29c7fb2b42464266bb7b449bb772
font_02_sfnt_off000122a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1