Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27b9e448b241074…

MALICIOUS

PDF

69.8 KB Created: 2021-09-17 22:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91f8e73413897f9da2ed0532bca89187 SHA-1: b7720466e3e3485044bc3aa6efe2eae78b4ea7af SHA-256: d27b9e448b2410743c5941a78f1e2f0be5a96110e77f2fd6e15113c61e61f778
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to suspicious PDF files on various domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no explicit script was found, the PDF structure and URL patterns are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144caa8cca01---zapoxegaxetibif.pdf
    • http://atrsara.ir/resource/files/39040660428.pdf
    • http://showdoimovel.com/files/files/zitogopunaxol.pdf
    • https://istanajpdua.com/contents/files/rijuxidifeke.pdf
    • http://cadelupo.it/userfiles/files/43794019350.pdf
    • https://gamepinleri.net/calisma2/files/uploads/taxaditonikilixop.pdf
    • http://burmeseburmilla-allevamento.com/userfiles/files/44754625482.pdf
    • https://hnhaa.com/userfiles/tnejp/files/90369751469.pdf
    • http://classicalgardenfountains.com/uplds/file/71458640723.pdf
    • http://mail-ex.net/userfiles/file/kazalazimanekexudu.pdf
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/wofanogidakujewigizive.pdf
    • https://hkfew.org.hk/ckfinder/userfiles/files/19216303660.pdf
    • http://sportschoolindex.nl/images/uploads/sisufepevarurin.pdf
    • https://snoman.mb.ca/ckfinder/userfiles/files/fibanegufasagur.pdf
    • https://webrobogo.hu/kepek/fesuz.pdf
    • http://cermak-expo.cz/data/files/file/wasukaf.pdf
    • http://futimisdev.com/userfiles/file/80717506702.pdf
    • http://parfumerieindex.nl/images/uploads/42790440429.pdf
    • http://jeykrishnaclub.com/images/file/86721572765.pdf
    • https://myclubowners.travelenvogue.com/userfiles/files/pezajixovabube.pdf
    • http://www.rpv-drachten.nl/files/file/kupokogonorijegoxugog.pdf
    • http://dgjinhak.kr/DATA/upload/files/202109080845062756.pdf
    • https://sujatasfoodopolis.com/ckfinder/userfiles/files/siwugovejupopedo.pdf
    • https://wonwon.taipei/photo/file/49366718788.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161367e6d67a0c---46625808510.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=index+of+vampire+diaries+s4
    • 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_off0000b3c0.bin
876f39d5f648efeb4173ff88724029df9cd9c028f2f935e8f80be7a3978a48ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C0 10712 bytes
font_01_sfnt_off0000cc64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC64 16792 bytes
font_02_sfnt_off0000e476.bin
b68de2c5e881365d30e059178913ee582199ed249bff412ce701b5e6161deeb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 14696 bytes

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