Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f968caf4cc5642c…

MALICIOUS

PDF

73.5 KB Created: 2021-10-01 00:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c00d4001a9ad0e51dd08febf85aba73c SHA-1: 5ae25ebc0af8bdf8af0284c333db7ae77445057a SHA-256: 9f968caf4cc5642c51cedc466749377753b36bb5df17babac6b23af68e758bcc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://commandhousecreations.com/uploads/files/jutunonikifirejiguwow.pdf In PDF document text
    • http://tizianaiberti.it/userfiles/files/satulovojijogakobi.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146c2560dd71---46092824054.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/bovupawawipiki.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/31125855978.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/jovemo.pdfIn PDF document text
    • http://chinalabware.es/d/files/18112107357.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/lenadurib.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/9251434271.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/41661251493.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/70842419663.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/93850400076.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/48110366839.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/58268377655.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131414e64d0f---70012527149.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/fedorubewevitakizebefuzu.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/2181583180.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/40928717086.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/jabetom.pdfIn PDF document text
    • http://merydian.pl/nowymerydian/userfiles/file/39812031158.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/seponarewasuxok.pdfIn PDF document text
    • http://kechengchem.com/upload/files/64571519705.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/84985226465.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/67408248168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=tv+guide+apkPDF 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_off0000ba4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD262 10152 bytes
SHA-256: becb1e0f2161ebdb3578e0b2e72365582f681043e84c8cc125e4444af5d9c19e
font_02_sfnt_off0000e900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 18456 bytes
SHA-256: 6be34cdca22a3e4aacd08aa50346c027ef49a652a8057cb06e0c73d06c762014