Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7da93a59a025ad…

MALICIOUS

PDF

68.8 KB Created: 2021-09-10 15:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5879187566e5624fb1692e41db8a07a0 SHA-1: c2da64451238d4992c137c14cb63e1a7a295481a SHA-256: 2e7da93a59a025add87e365ec844712c9a0e2311f8ea29bf6f00fa701d06e6d9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to various domains, many of which are hosted on compromised or disposable infrastructure. The primary purpose appears to be redirecting users to potentially harmful content, such as phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://hebatkeren88.com/contents/files/naxupevakajafalolisuf.pdf In PDF document text
    • http://batistar.fr/userfiles/file/17406483588.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/pusakavivemotaxizijenuj.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314242be21d---soluwinuzujem.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/16304574210.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/wixufifizedowulumazu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0581e0d4c---lafovufivaxumavonumefev.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/25872940943.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/xakapupakarejube.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/liwewidakolu.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/marurixizu.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/d538d86d61c7c056942abb350f142c81/tewenawovoxuroduwekelatef.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/70512936184.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/79407516529.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/dolirodusenadogelukejib.pdfIn PDF document text
    • http://hoachattn.com/image/files/rizusesubowijupew.pdfIn PDF document text
    • http://cobmedia.hu/include/lazilepikok.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/28031969103.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-10/20210910042824431420.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/sukogu.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/tetabekuvilubudegixojopo.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/susejukusesovog.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/jonitifanotafixosunoduwig.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/35709957888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=vivacut+pro+happymodPDF 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_off0000b110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB110 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC927 10580 bytes
SHA-256: 152bba022b9bf0588bc90527e9be59b3209f73e76f360a34e8073a759b0eb69e
font_02_sfnt_off0000e15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15D 14604 bytes
SHA-256: 67a03735739dd28df1f4e7c1833229d766bc5fbbf89efb3dfbd1e0ba56f7b268

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