Malicious PDF — malware analysis report

Static analysis result for SHA-256 74016c5647d1f64b…

MALICIOUS

PDF

74.3 KB Created: 2021-09-17 00:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6297cbdbde723b184984b7032ba1225 SHA-1: 6ccd4134f81b8bbad88aca7766a75a7eb93c20fc SHA-256: 74016c5647d1f64be63603903e2948412cc947465d7ecc7fc4503ae19e8109ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

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 https://irlanc.ru/uplcv?utm_term=step+by+step+d%26d+character+creation
    • http://cancunday.com/travela/img/files/sasabibadixebasa.pdf
    • http://auto-spec.ca/fck/file/53576490924.pdf
    • http://mebelhotel.ru/userfiles/files/93002595005.pdf
    • https://cafesca.org/ckfinder/userfiles/files/bojukipulufitudevoxomonix.pdf
    • http://ylphs.com/ckfinder/userfiles/files/gaterogofajitomonufuk.pdf
    • http://bulgankhangai.mn/userfiles/files/biliwulitegur.pdf
    • http://poliinc.com/upload/files/vapisogitoparixijaweripiv.pdf
    • http://yilip.net/userData/board/file/meluxuxilelatomimafed.pdf
    • http://hurtglass.pl/upload/file/suzuwu.pdf
    • https://optical-axis.com/uploads/files/202109010151167586.pdf
    • http://asqcert.net/files/files/gebigogav.pdf
    • http://azstorestudio.com/uploads/files/35277673530.pdf
    • https://didaktika.drmix.cz/uploads/files/25989296721.pdf
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/duwevikematumovivod.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/3688730686.pdf
    • http://cokhixnktientien.com/Images_upload/files/sasadixuve.pdf
    • http://haiqi-machine.com/d/files/22597153409.pdf
    • http://cofetariafraguta.ro/UserFiles/file/4844234198.pdf
    • https://global-product.org/CKEdit/upload/files/23219934386.pdf
    • http://digitalpolicycouncil.org/imagenes/file/81914015154.pdf
    • http://asacnfservices.com/ckfinder/userfiles/files/51691374622.pdf
    • http://eventechsite.com/files/files/zovovomutolav.pdf
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/912718586.pdf
    • https://mygoaltv.org/ipp/images/uploads/files/wajoludinuzudijel.pdf
    • http://jfe.hk/userfiles/36109584753.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1fd.bin
df9cff8cf7e2032f40c49fb82103ed072499b3d98d3799debc6b3fdcadcbb688		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FD 10092 bytes
font_01_sfnt_off0000d859.bin
af4eefb41a3133edaf7f5050b11bf1f3dbf7cad1ec9e397d173946d386338fe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD859 16748 bytes
font_02_sfnt_off00010386.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 16792 bytes

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