Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a00ca3b96acba32…

MALICIOUS

PDF

69.0 KB Created: 2021-09-10 23:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 37fe7cbba559548dc945903dc47ed8b4 SHA-1: 2f396c174fba0b6676c5f4ffd9a1ea55f9ff0ebd SHA-256: 6a00ca3b96acba32c8d514677188adf4a12965a126882a9874cd642483f6eef9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to potentially malicious PDF files hosted on various domains. The PDF structure and the presence of external URIs suggest a phishing or malware distribution lure, likely intended to trick users into downloading further malicious content. No scripts were extracted, but the overall pattern points to a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ledseoul.com/userData/board/file/wowelikukubosipude.pdf In PDF document text
    • https://jerseyshorepirates.com/userfiles/files/sokitigolalodedonuf.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/53502742665.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161302fd33cb0a---65710377288.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/jiluxumogokalobelejuzu.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/resilowipalunujotonuda.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/rapuvugupuz.pdfIn PDF document text
    • http://soupworld.de/upload/file/7385361524.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/96414937974.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/74743213522.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/nezovosovegazexokujogowud.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/2852791020.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/zutob.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/lifusokimatati.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/piwexusixurinibijigikoza.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/73370823424.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/japevomasikak.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/76725129838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=fire+fire+mod+apk+unlimited+diamondsPDF 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_off0000add7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD7 10828 bytes
SHA-256: f7342e0db6a2cd0ba457db6cdae2324f6407cf9841e8746e3f85864766409287
font_01_sfnt_off0000c6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDD 15684 bytes
SHA-256: e7f6e5e6ef02b2f650823477f03bad057794c8fad68190c424ace895edb6f527

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